insect

in·sect

I0160100 (ĭn′sĕkt′)n.1. a. Any of numerous arthropod animals of the class Insecta, having an adult stage characterized by three pairs of legs and a body segmented into head, thorax, and abdomen and usually having one or two pairs of wings. Insects include the flies, crickets, mosquitoes, beetles, butterflies, and bees.b. Any of various other small, chiefly arthropod animals, such as spiders, centipedes, or ticks, usually having many legs. Not in scientific use.2. An insignificant or contemptible person.

[Latin īnsectum, from neuter past participle of īnsecāre, to cut up (translation of Greek entomon, segmented, cut up, insect) : in-, in; see in-² + secāre, to cut; see sek- in Indo-European roots.]

in′sect′ adj.in′sec·ti′val (ĭn′sĕk-tī′vəl) adj.

insect

(ˈɪnsɛkt) n1. (Animals) any small air-breathing arthropod of the class Insecta, having a body divided into head, thorax, and abdomen, three pairs of legs, and (in most species) two pairs of wings. Insects comprise about five sixths of all known animal species, with a total of over one million named species. 2. (Animals) (loosely) any similar invertebrate, such as a spider, tick, or centipede3. a contemptible, loathsome, or insignificant person[C17: from Latin insectum (animal that has been) cut into, insect, from insecāre, from in-² + secāre to cut; translation of Greek entomon insect] inˈsectean, inˈsectan, inˈsectile adj ˈinsect-ˌlike adj

in•sect

(ˈɪn sɛkt)

n. 1. any animal of the class Insecta, comprising small, air-breathing arthropods having the body divided into three parts (head, thorax, and abdomen), and having two antennae, three pairs of legs, and usu. two pairs of wings. 2. any small arthropod, such as a spider, tick, or centipede, having a superficial, general similarity to members of the class Insecta. 3. a contemptible or unimportant person. adj. 4. of, pertaining to, like, or used for or against insects: an insect bite; insect powder. [1595–1605; < Latin insecāre to incise, cut (compare segment); translation of Greek éntomon insect, literally, notched or incised one; see entomo-] in`sec•ti′val (-ˈtaɪ vəl) adj.

in·sect

(ĭn′sĕkt′) Any of numerous small arthropods that have six segmented legs in the adult stage and a body divided into three parts. The three parts are the head, thorax, and abdomen, and the thorax often has a pair of wings. Flies, bees, grasshoppers, beetles, butterflies, and moths are all insects. More than 600,000 species are known, most of them beetles. See Notes at biomass, bug, entomology.

insect

, spider, crustacean - One major difference between insects, spiders, and crustaceans is the antennae; most insects have one pair, spiders have none, and crustaceans have two pairs.See also related terms for spider.

Thesaurus

Noun	1.	insect - small air-breathing arthropod Arthropoda, phylum Arthropoda - jointed-foot invertebrates: arachnids; crustaceans; insects; millipedes; centipedesarthropod - invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitinclypeus - a shield-like plate on the front of an insect's headwing - a movable organ for flying (one of a pair)ala - a wing of an insectsocial insect - an insect that lives in a colony with other insects of the same speciesephemeral, ephemeron - anything short-lived, as an insect that lives only for a day in its winged formholometabola, metabola - insects that undergo complete metamorphosisdefoliator - an insect that strips the leaves from plantspollinator - an insect that carries pollen from one flower to anothergallfly - any of various insects that deposit their eggs in plants causing galls in which the larvae feedmecopteran - any of various carnivorous insects of the order Mecopteracollembolan, springtail - any of numerous minute wingless primitive insects possessing a special abdominal appendage that allows the characteristic nearly perpetual springing pattern; found in soil rich in organic debris or on the surface of snow or waterproturan, telsontail - any of several minute primitive wingless and eyeless insects having a cone-shaped head; inhabit damp soil or decaying organic matterbeetle - insect having biting mouthparts and front wings modified to form horny covers overlying the membranous rear wingsweb spinner - any of a small order of slender typically tropical insects that nest in colonies in silken tunnels that they spinlouse, sucking louse - wingless usually flattened bloodsucking insect parasitic on warm-blooded animalsbird louse, biting louse, louse - wingless insect with mouth parts adapted for biting; mostly parasitic on birdsflea - any wingless bloodsucking parasitic insect noted for ability to leapdipteran, dipteron, dipterous insect, two-winged insects - insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures and mouth parts adapted for sucking or lapping or piercingleaf miner, leaf-miner - any of various small moths or dipterous flies whose larvae burrow into and feed on leaf tissue especially of the family Gracilariidaehymenopter, hymenopteran, hymenopteron, hymenopterous insect - insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercingworker - sterile member of a colony of social insects that forages for food and cares for the larvaetermite, white ant - whitish soft-bodied ant-like social insect that feeds on woodorthopteran, orthopteron, orthopterous insect - any of various insects having leathery forewings and membranous hind wings and chewing mouthpartsphasmid, phasmid insect - large cylindrical or flattened mostly tropical insects with long strong legs that feed on plants; walking sticks and leaf insectsdictyopterous insect - cockroaches and mantidsbug - general term for any insect or similar creeping or crawling invertebratehemipteran, hemipteron, hemipterous insect, bug - insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosisheteropterous insect - true bugs: insects whose forewings are membranous but have leathery tipshomopteran, homopterous insect - insects having membranous forewings and hind wingspsocopterous insect - small soft-bodied insect with chewing mouthparts and either no wings or two pairsephemerid, ephemeropteran - short-lived insectplecopteran, stone fly, stonefly - primitive winged insect with a flattened body; used as bait by fishermen; aquatic gilled larvae are carnivorous and live beneath stonesneuropteran, neuropteron, neuropterous insect - insect having biting mouthparts and four large membranous wings with netlike veinsodonate - large primitive predatory aquatic insect having two pairs of membranous wingstrichopteran, trichopteron, trichopterous insect - caddis flythysanuran insect, thysanuron - primitive wingless insects: bristletailthysanopter, thysanopteron, thysanopterous insect - an insect of the order Thysanopteraearwig - any of numerous insects of the order Dermaptera having elongate bodies and slender many-jointed antennae and a pair of large pincers at the rear of the abdomen
	2.	insect - a person who has a nasty or unethical character undeserving of respectdirt ball, louse, wormdisagreeable person, unpleasant person - a person who is not pleasant or agreeable

insect

noun bug, creepy-crawly (Brit. informal), gogga (S. African informal)Related words
adjective entomic
collective noun swarm
like entomomania
fear entomophobia see ants, bees and wasps, beetles, bugs, butterflies and moths, flies

Insects

Types of insect apple maggot, body louse, cootie (U.S. & N.Z.), or (N.Z. slang) kutu, bollworm, booklouse, bookworm, bristletail, cabbageworm, caddis worm or caseworm, cankerworm, cochineal or cochineal insect, cockroach, cotton stainer, crab (louse), cricket, earwig, or (Scot. dialect) clipshears, or clipshear, flea, German cockroach or (U.S.) Croton bug, grasshopper, katydid, lac insect, locust, louse, mantis or praying mantis, measuring worm, looper, or inchworm, midge, mole cricket, mosquito, nit, phylloxera, scale insect, seventeen-year locust or periodical cicada, sheep ked or sheep tick, silkworm, silverfish, stick insect or (U.S. & Canad.) walking stick, sucking louse, tent caterpillar, thrips, treehopper, wax insect, web spinner, weta, wheel bug, wireworm, woodwormParts of insects acetabulum, air sac, antenna, arista, cercus, cirrus, clasper, clypeus, compound eye, corium, coxa, elytron, endocuticle, epicuticle, exocuticle, femur, flagellum, forewing, glossa, gonopod, hamulus, haustellum, hemelytron, ileum, jaw, labium, labrum, ligula, Malpighian tubule, mandible, maxilla, mesothorax, metathorax, notum, ocellus, ovipositor, pedicel, proboscis, proleg, pronotum, prosternum, prothorax, proventriculus, pulvillus, scape, scutellum, scutum, snout, spinneret, spiracle, stigma, tarsus, tegmen, thigh, thorax, tibia, trachea, trochanter, underwing, ventriculus

Translations

昆虫

insect

(ˈinsekt) noun any of many kinds of small six-legged creatures with wings and a body divided into sections. We were bothered by flies, wasps and other insects.昆虫insecticide (inˈsektisaid) noun a substance (usually in powder or liquid form) for killing insects. 杀虫剂ˌinsecˈtivorous (-ˈtivərəs) adjective (of plants or animals) feeding (mainly) on insects. 食虫的ˈinsect repellent noun a chemical preparation that repels insects. 杀虫剂

insect

→ 昆虫zhCN

Do you have insect repellant? → 你们出售驱虫剂吗？

insect

insect,

invertebrate animal of the class Insecta of the phylum ArthropodaArthropoda
[Gr.,=jointed feet], largest and most diverse animal phylum. The arthropods include crustaceans, insects, centipedes, millipedes, spiders, scorpions, and the extinct trilobites.
..... Click the link for more information. . Like other arthropods, an insect has a hard outer covering, or exoskeleton, a segmented body, and jointed legs. Adult insects typically have wings and are the only flying invertebrates.

The body of the typical adult insect is divided into three distinct parts, the head, thorax, and abdomen. The head bears three pairs of mouthparts, one pair of compound eyes, three simple eyes (ocelli), and one pair of jointed sensory antennae. The thorax is divided into three segments, each with a pair of jointed legs, and bears two pairs of wings. The abdomen has posterior appendages associated with reproduction. The exoskeleton is composed of a horny substance called chitin.

Insects breathe through a complex network of air tubes (tracheae) that open to the outside through a series of small valved apertures (spiracles) along the sides of the body. In chewing insects the digestive system includes a muscular gizzard that is lacking in sucking insects. The simple circulatory system is composed of a tubular heart that pumps blood forward into the head, from which it diffuses through the tissues and back into the heart. The aquatic larvae of many insects breathe by means of external gills; some very primitive species breathe directly through the body wall.

Insect Species

There are about 900,000 known insect species, three times as many as all other animal species together, and thousands of new ones are described each year. They are commonly grouped in 27 to 32 orders, depending upon the classification used. The largest order is that of the beetlesbeetle,
common name for insects of the order Coleoptera, which, with more than 300,000 described species, is the largest of the insect orders. Beetles have chewing mouthparts and well-developed antennae.
..... Click the link for more information. (Coleoptera). Next, in order of size, are the mothsmoth,
any of the large and varied group of insects which, along with the butterflies, make up the order Lepidoptera. The moths comprise the great majority of the 100,000 species of the order, and about 70 of its 80 families.
..... Click the link for more information. and butterfliesbutterfly,
any of a large group of insects found throughout most of the world; with the moths, they comprise the order Lepidoptera. There are about 12 families of butterflies. Most adult moths and butterflies feed on nectar sucked from flowers.
..... Click the link for more information. (Lepidoptera); the waspswasp,
name applied to many winged insects of the order Hymenoptera, which also includes ants and bees. Most wasps are carnivorous, feeding on insects, grubs, or spiders. They have biting mouthparts, and the females have stings with which they paralyze their prey.
..... Click the link for more information. , antsant,
any of the 2,500 insect species constituting the family Formicidae of the order Hymenoptera, to which the bee and the wasp also belong. Like most members of the order, ants have a "wasp waist," that is, the front part of the abdomen forms a narrow stalk, called the waist,
..... Click the link for more information. , and beesbee,
name for flying insects of the superfamily Apoidea, in the same order as the ants and the wasps. Bees are characterized by their enlarged hind feet, typically equipped with pollen baskets of stiff hairs for gathering pollen.
..... Click the link for more information. (Hymenoptera); and the fliesfly,
name commonly used for any of a variety of winged insects, but properly restricted to members of the order Diptera, the true flies, which includes the housefly, gnat, midge, mosquito, and tsetse fly.
..... Click the link for more information. and mosquitoesmosquito
, small, long-legged insect of the order Diptera, the true flies. The females of most species have piercing and sucking mouth parts and apparently they must feed at least once upon mammalian blood before their eggs can develop properly.
..... Click the link for more information. (Diptera). Other major orders are the true bugsbug,
common name correctly applied to insects belonging to the order Hemiptera, although members of the order Homoptera (e.g., mealybug) are sometimes referred to as bugs, as are other insects in general.
..... Click the link for more information. (Hemiptera); the cicadascicada
, large, noise-producing insect of the order Homoptera, with a stout body, a wide, blunt head, protruding eyes, and two pairs of membranous wings. The front wings, which are longer than the rear pair, extend beyond the insect's abdomen.
..... Click the link for more information. , aphidsaphid
or plant louse,
tiny, usually green, soft-bodied, pear-shaped insect injurious to vegetation. It is also called greenfly and blight. Aphids are mostly under 1-4 in. (6 mm) long.
..... Click the link for more information. , and scale insectsscale insect,
common name for members of a highly modified group of insects belonging to several families of the superfamily Coccoidea. Scales possess antennae and are characterized by reduced legs. Only the males have wings; females are always wingless.
..... Click the link for more information. (Homoptera); the grasshoppersgrasshopper,
name applied to almost 9,000 different species of singing, jumping insects in two families of the order Orthoptera. Grasshoppers are long, slender, winged insects with powerful hind legs and strong mandibles, or mouthparts, adapted for chewing.
..... Click the link for more information. and cricketscricket,
common name of the slender, chirping, hopping insects forming the family Gryllidae in the order Orthoptera. Most crickets have long antennae, muscular hind legs for jumping, and two pairs of fully developed wings. In some subfamilies the wings are reduced or absent.
..... Click the link for more information. (Orthoptera); the cockroachescockroach
or roach,
name applied to some 4,600 species of flat-bodied, oval insects in the order Blattodea. Cockroaches have long antennae, long legs adapted to running, and a flat extension of the upper body wall that conceals the head. They range from 1-4 in. to 3 in.
..... Click the link for more information. and termitestermite
or white ant,
common name for a soft-bodied social insect of the infraorder Isoptera. Originally classified in as a separate order, termites are genetically related to cockroaches and are now classified with them in the order Blattodea.
..... Click the link for more information. (Blattodea); and the mantidsmantid
or mantis,
name applied to the large, slender, slow-moving, winged insects of the family Mantidae in the order Mantodea. Predatory insects, mantids have strong, elongate, spiny front legs, used for grasping prey.
..... Click the link for more information. (Mantodea).

Insects are found throughout the world except near the poles and pervade every habitat except the sea (although there is one marine species of water strider). Fossil records indicate that many species exist today in much the same form as they did 200 million years ago. Their enormous biological success is attributed to their small size, their high reproductive rate, and the remarkable adaptive abilities of the group as a whole, shown by the enormous variety in body structure and way of life. The mouthparts may be adapted to chewing, sucking, piercing, or lapping and the legs for walking, running, jumping, burrowing, or swimming. Insects may feed on plants or decaying matter or prey upon other small animals (especially other insects) or parasitize larger ones; they may be omnivorous or highly specialized in their diets. They display a remarkable variety of adaptive shapes and colors that may serve either as camouflage or as warning (see mimicrymimicry,
in biology, the advantageous resemblance of one species to another, often unrelated, species or to a feature of its own environment. (When the latter results from pigmentation it is classed as protective coloration.
..... Click the link for more information. ). Some have stinging spines or hairs and blistering or noxious secretions, used for defense.

Reproduction

A few species, notably the firefliesfirefly
or lightning bug,
small, luminescent, carnivorous beetle of the family Lampyridae. Fireflies are well represented in temperate regions, although the majority of species are tropical and subtropical.
..... Click the link for more information. , produce light, used as a signal in courtship, by a chemical reaction. The sexes are separate in insects, and reproduction is usually sexual, although in many insect groups eggs sometimes develop without fertilization by sperm (see parthenogenesisparthenogenesis
[Gr.,=virgin birth], in biology, a form of reproduction in which the ovum develops into a new individual without fertilization. Natural parthenogenesis has been observed in many lower animals (it is characteristic of the rotifers), especially insects, e.g.
..... Click the link for more information. ). In some insects, such as bees, unfertilized eggs become males and fertilized eggs females. In others, such as aphids, all-female generations are produced by parthenogenesis. Eggs are usually laid in a sheltered place; in a few insects they are retained and hatched internally. After hatching, the insect must molt periodically as it grows, since the rigid exoskeleton does not allow much expansion. A new, soft exoskeleton forms beneath the old one, and after each molt the insect undergoes a rapid expansion before its new covering hardens. The stages between molts are called instars; the final instar is the adult.

Metamorphosis

In nearly all insects growth involves a metamorphosis, that is, a transformation in form and in way of life. Complete, or indirect, metamorphosis is characteristic of over 80% of all insect species and has four stages: egg, larva, pupa, and adult. The wingless, wormlike larva (in many species called a grub or a caterpillar) is completely unlike the adult, and its chief activities are eating and growing. Only the simple eyes are present, and the mouth is the chewing type, even in species whose adults have other kinds of mouthparts. After several molts the larva enters a quiescent stage called the pupa; the pupa does not eat and usually does not move, but within the exoskeleton a major transformation occurs that involves the reorganization of organ systems as well as the development of such adult external structures as wings and compound eyes. In some insects the pupa is enclosed in a protective case, called the cocoon, built by the larva just before pupation. When the transformation is complete the final molt occurs: the adult emerges, its wings fill with blood and expand, and the new exoskeleton hardens. The chief function of the adult is propagation; in some species it does not eat.

Incomplete, or gradual, metamorphosis is seen in members of less advanced orders (such as locusts and their relatives and the true bugs). The larva, often called a nymph (or, if aquatic, a naiad) is usually similar in form to the adult, but lacks wings. The wings begin as external bumps on the larva, and the adult emerges from the last molt without having undergone a pupal stage.

In a few very primitive, wingless insects (such as the silverfishsilverfish,
common name for primitive, wingless insects of the family Lepismatidae. The silverfish, which has two long antennae and three long tail bristles, is named for its covering of tiny, silvery scales. It develops directly in six or more molts into an adult about 1-2 in.
..... Click the link for more information. ) there is no metamorphosis. The insect emerges from the egg as a miniature adult and the only futher changes are in size and in maturation of the reproductive organs.

Insect Pests

Plant-eating insects cause enormous damage to crops; any part of a plant is subject to attack by either the adult or the larva of some insect. Among the well-known plant pests are the locust, armywormarmyworm,
larva, or caterpillar, of a moth, Pseudaletia unipuncta or Mythimna unipuncta, found in North America E of the Rocky Mts.; also known as the common, or true, armyworm.
..... Click the link for more information. , aphid, corn borercorn borer
or European corn borer,
common name for the larva of a moth of the family Pyralidae, introduced from S Europe into the Boston area in 1917. The corn borer, Ostrinia nubilalis,
..... Click the link for more information. , coddling moth, tent caterpillartent caterpillar,
common name for the larvae of the members of a family of moths (Lasiocampidae), easily recognized by the large silk tents, or webs, that the larvae construct during the spring in the crotches of trees, particularly apple and cherry trees.
..... Click the link for more information. , Japanese beetleJapanese beetle,
common name for a destructive beetle, Popillia japonica, of the scarab beetle family. Accidentally imported to the United States from Japan, it was first discovered in New Jersey in 1916 and is now widespread in the northeastern states, where it is a
..... Click the link for more information. , gypsy mothgypsy moth,
common name for a moth, Lymantria dispar, of the tussock moth family, native to Europe and Asia. Its caterpillars, or larvae, defoliate deciduous and evergreen trees and shrubs. Introduced from Europe into Massachusetts c.
..... Click the link for more information. , bagwormbagworm,
common name for the larva of small moths of the family Psychidae. The larva spins a silken cocoon as it travels, hence the term bagworm. When fully grown, the bagworm fastens its covering to a twig and pupates within it.
..... Click the link for more information. , and scale insect. Insect carriers of human diseases include the mosquito, houseflyhousefly,
common name of the fly Musca domestica, found in most parts of the world. The housefly, a scavenger, does not bite living animals but is dangerous because it carries bacteria and protozoans that cause many serious diseases, e.g.
..... Click the link for more information. , tsetse flytsetse fly
, name for any of several bloodsucking African flies of the genus Glossina, and in the same family as the housefly. The larva of the tsetse fly develops inside the body of the mother until it is ready to pupate in the soil.
..... Click the link for more information. , and fleaflea,
common name for any of the small, wingless insects of the order Siphonaptera. The adults of both sexes eat only blood and are all external parasites of mammals and birds. Fleas have hard bodies flattened from side to side and piercing and sucking mouthparts.
..... Click the link for more information. .

Beneficial Insects

Many insects are valuable as predators on the harmful species, and some are important as scavengers and as aerators of the soil (see scarab beetlescarab beetle
or scarab,
name for members of a large family of heavy-bodied, oval beetles (the Scarabaeidae), with about 30,000 species distributed throughout most of the world and over 1,200 in North America.
..... Click the link for more information. ). Most important, many plants depend on insects as agents of pollination; in fact, flowering plants and insects evolved together. Insects are the source of useful products such as honeyhoney,
sweet, viscid fluid produced by honeybees from the nectar of flowers. The nectar is taken from the flower by the worker bee and is carried in the honey sac back to the hive.
..... Click the link for more information. , beeswax, silksilk,
fine, horny, translucent, yellowish fiber produced by the silkworm in making its cocoon and covered with sericin, a protein. Many varieties of silk-spinning worms and insects are known, but the silkworm of commerce is the larva of the Bombyx mori,
..... Click the link for more information. , laclac,
resinous exudation from the bodies of females of a species of scale insect (Tachardia lacca), from which shellac is prepared. India is the chief source of shellac, although some is obtained from other areas in Southeast Asia.
..... Click the link for more information. , and cochinealcochineal
, natural dye obtained from an extract of the bodies of the females of the cochineal bug (Dactylopius confusus) found on certain species of cactus, especially Nopalea coccinellifera, native to Mexico and Central America.
..... Click the link for more information. . They are a major source of food for many animals, and some are eaten by humans in many parts of the world. The fruit flyfruit fly,
common name for any of the flies of the families Tephritidae and Drosophilidae. All fruit flies are very small insects that lay their eggs in various plant tissues.
..... Click the link for more information. has been the major experimental animal used in genetics.

Bibliography

See R. F. Chapman, The Insects (1982); M. V. Brian, Social Insects (1983); P. W. Price, Insect Ecology (1984); R. H. Arnett, American Insects (1985); The Audubon Society Field Guide to North American Insects and Spiders (1992); H. Raffles, Insectopedia (2010); M. Zuk, Sex on Six Legs (2011).

insect

[′in‚sekt] (invertebrate zoology) A member of the Insecta. An invertebrate that resembles an insect, such as a spider, mite, or centipede.

Insect

archyliterary cockroach that cannot reach shift-key on the typewriter. [Am. Lit.: archy and mehitabel; Benét, 46]bread-and-butter-flyits body is a crust; lives on weak tea. [Br. Lit.: Lewis Carroll Through the Looking-glass]Charlotte’s Webstory of a spider who saves a young girl’s pet pig. [Am. Lit.: E. B. White Charlotte’s Web]gnatchicken-sized insect that tells Alice all about other strange insects. [Br. Lit.: Lewis Carroll Through the Looking-glass]MetamorphosisGregor Samsa turned into a huge insect. [Ger. Lit.: Kafka Metamorphosis]rocking-horse-flywooden insect feeds on sap and sawdust. [Br. Lit.: Lewis Carroll Through the Looking-glass]snap-dragon-flyhas a body of plum pudding and lives on mince pie. [Br. Lit.: Lewis Carroll Through the Looking-glass]

insect

1. any small air-breathing arthropod of the class Insecta, having a body divided into head, thorax, and abdomen, three pairs of legs, and (in most species) two pairs of wings. Insects comprise about five sixths of all known animal species, with a total of over one million named species 2. (loosely) any similar invertebrate, such as a spider, tick, or centipede

Insects

(dreams)Some dream interpretation books name specific insect symbols. However, the main idea to consider when you are interpreting this dream symbol is that you may currently be annoyed or “bugged” by a person or a situation in life. Use common sense and some general impressions about the specific insect when interpreting your dream. For example, if you are dreaming about bees stinging you, think about some of your relationships. If you are dreaming about ants consider you social interactions and work ethic.

insect

in·sect

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Insects

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insect,

Insect Species

Reproduction

Metamorphosis

Insect Pests

Beneficial Insects

Bibliography

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Insects

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Patient discussion about insect

INSECT

insect

Synonyms for insect

noun bug

Synonyms

Synonyms for insect

noun small air-breathing arthropod

Related Words

noun a person who has a nasty or unethical character undeserving of respect

Synonyms

Related Words