释义 |
silkworm
silk·worm S0408000 (sĭlk′wûrm′)n. Any of various caterpillars that produce silk cocoons, especially the larva of a moth (Bombyx mori) native to Asia that spins a cocoon of fine, strong, lustrous fiber that is the source of commercial silk.silkworm (ˈsɪlkˌwɜːm) n1. (Animals) the larva of the Chinese moth Bombyx mori, that feeds on the leaves of the mulberry tree: widely cultivated as a source of silk2. (Animals) any of various similar or related larvae3. (Animals) silkworm moth the moth of any of these larvaesilk•worm (ˈsɪlkˌwɜrm) n. any of several moth caterpillars that spin a silken cocoon, esp. Bombyx mori, of China, which produces commercially valuable silk. [before 1000] silk·worm (sĭlk′wûrm′) Any of various caterpillars that produce silk cocoons, especially the larva of a moth native to Asia. The fiber of silkworm cocoons is the source of commercial silk.silkworm - Is not a worm, but a caterpillar.See also related terms for worms.ThesaurusNoun | 1. | silkworm - the commercially bred hairless white caterpillar of the domestic silkworm moth which spins a cocoon that can be processed to yield silk fiber; the principal source of commercial silkBombyx, genus Bombyx - type genus of the Bombycidae: Chinese silkworm mothcaterpillar - a wormlike and often brightly colored and hairy or spiny larva of a butterfly or mothsericterium, serictery, silk gland - silk-producing gland of insects (especially of a silkworm) or spiders | | 2. | silkworm - larva of a saturniid moth; spins a large amount of strong silk in constructing its cocoongiant silkworm, wild wilkwormfamily Saturniidae, Saturniidae - important and widely distributed family of moths including some of the largest insects knownailanthus silkworm, Samia cynthia - large green silkworm of the cynthia mothcaterpillar - a wormlike and often brightly colored and hairy or spiny larva of a butterfly or mothsericterium, serictery, silk gland - silk-producing gland of insects (especially of a silkworm) or spiders | Translationssilk (silk) noun1. very fine, soft threads made by silkworms. 絲,綢 丝,绸 2. thread, cloth etc made from this. The dress was made of silk; (also adjective) a silk dress. 絲織品 丝织品ˈsilky adjective soft, fine and rather shiny like silk. 絲般光滑細致柔軟的 丝一样光滑柔软的ˈsilkiness noun 光滑細致柔軟 光滑柔软ˈsilkworm noun the caterpillar of certain moths, which makes silk. 蠶 蚕silkworm
silkworm, name for the larvalarva, independent, immature animal that undergoes a profound change, or metamorphosis, to assume the typical adult form. Larvae occur in almost all of the animal phyla; because most are tiny or microscopic, they are rarely seen. They play diverse roles in the lives of animals. ..... Click the link for more information. of various species of moths, indigenous to Asia and Africa but now domesticated and raised for 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. production throughout most of the temperate zone. The culture of silkworms is called sericulture. The various species of silkworms raised today are distinguished by the quality of the silk they produce, the type of leaves on which they feed, and the number of breedings per year. The most widely raised type and the producer of the finest silk is the larva of Bombyx mori, of Asian origin. After centuries of domestication, Bombyx mori is no longer found anywhere in a natural state. The legs of the larvae have degenerated, and the adults do not fly. Hatched from eggs so small that about 35,000 of them weigh only an ounce, these silkworms are immediately quite active and feed voraciously on mulberry leaves. At the end of the larval stage (32 to 38 days after hatching) they are about 3 in. (7.5 cm) long. A mature larva attaches itself to a twig and, with a weaving motion of its head and a slow, circular motion of its body, begins to spin its cocoon (see pupapupa , name for the third stage in the life of an insect that undergoes complete metamorphosis, i.e., develops from the egg through the larva and the pupa stages to the adult. ..... Click the link for more information. ). A moist substance, fibroin, is manufactured in two silk glands located on the underside of the larva's body; mixed with a small amount of wax, it is emitted from an orifice called the spinneret, in the lip of the larva. The fibroin dries quickly in the air, hardening into a half-mile-long thread of silk that makes up the cocoon. The adult moth, with a wingspread of 1.75 in. (4.5 cm), emerges from the cocoon in about two weeks. The moths mate and lay their eggs (several hundred from each female) within a week; the eggs hatch in about ten days. Only enough cocoons to ensure adequate reproduction are allowed to hatch; the rest are unwound after developing for a week, and the silk is processed. The giant silkworms used in some Asian and South American sericulture are the larvae of the closely related saturnid moths (family Saturniidae). They include the tussah moth (Antherala pernyi), the producer of tussah silk. The ailanthus moth (Samia walkeri), a large, olive-green saturnid moth used in China to produce a coarse grade of silk, was imported to the United States along with its food plant, the Chinese ailanthus tree, as the basis of an industry that never materialized; the moth has been firmly established in the New York City area since 1861. Diseases of silkworms have occasioned important scientific work. When Pasteur saved the French silk industry from destruction by pébrine, a protozoan disease of insects, in the mid-18th cent., he also made an important contribution to the germ theory of disease. The common silkworm, Bombyx mori, is classified in 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. , class Insecta, order Lepidoptera, family Bombycidae.silkworm[′silk‚wərm] (invertebrate zoology) The larva of various moths, especially Bombyx mori, that produces a large amount of silk for building its cocoon. silkworm1. the larva of the Chinese moth Bombyx mori, that feeds on the leaves of the mulberry tree: widely cultivated as a source of silk 2. any of various similar or related larvae 3. silkworm moth the moth of any of these larvae LegalSeesilksilkworm Related to silkworm: Silkworm EggsSynonyms for silkwormnoun the commercially bred hairless white caterpillar of the domestic silkworm moth which spins a cocoon that can be processed to yield silk fiberRelated Words- Bombyx
- genus Bombyx
- caterpillar
- sericterium
- serictery
- silk gland
noun larva of a saturniid mothSynonyms- giant silkworm
- wild wilkworm
Related Words- family Saturniidae
- Saturniidae
- ailanthus silkworm
- Samia cynthia
- caterpillar
- sericterium
- serictery
- silk gland
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