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单词 hemlock
释义

hemlock


hemlockeastern hemlockTsuga canadensis

hem·lock

H0145300 (hĕm′lŏk′)n.1. a. Any of various coniferous evergreen trees of the genus Tsuga of North America and eastern Asia, having small cones and short flat leaves with two white bands underneath.b. The wood of such trees, used as a source of lumber, wood pulp, and tannic acid.2. a. Any of several poisonous plants of the genera Conium and Cicuta of the parsley family, such as the poison hemlock.b. A poison obtained from the poison hemlock.
[Middle English hemlok, poisonous hemlock, from Old English hymlice, hemlic.]

hemlock

(ˈhɛmˌlɒk) n1. (Plants) an umbelliferous poisonous Eurasian plant, Conium maculatum, having finely divided leaves, spotted stems, and small white flowers. US name: poison hemlock See also water hemlock2. (Plants) a poisonous drug derived from this plant3. (Plants) Also called: hemlock spruce any coniferous tree of the genus Tsuga, of North America and E Asia, having short flat needles: family Pinaceae. See also western hemlock4. (Plants) the wood of any of these trees, used for lumber and as a source of wood pulp[Old English hymlic; perhaps related to hymele hop plant, Middle Low German homele, Old Norwegian humli, Old Slavonic chǔmelï]

hem•lock

(ˈhɛmˌlɒk)

n. 1. a poisonous plant, Conium maculatum, of the parsley family, having finely divided leaves and umbels of small white flowers. 2. a poisonous drink made from this plant. 3. any of various related plants, esp. of the genus Cicuta, as the water hemlock. 4. Also called hem′lock spruce′. any of several tall coniferous trees of the genus Tsuga, of the pine family, having short, blunt needles and small cones. 5. the soft, light wood of a hemlock tree, used in making paper and in construction. [before 900; Middle English hemlok, humlok, Old English hymlic, hemlic; perhaps akin to Old English hymele hop plant]

hem·lock

(hĕm′lŏk′)1. Any of various coniferous evergreen trees of North America and eastern Asia, having small cones and short, flat leaves with two white bands underneath.2. Any of several poisonous European plants that have small, white flowers.
Thesaurus
Noun1.hemlock - poisonous drug derived from an Eurasian plant of the genus Coniumhemlock - poisonous drug derived from an Eurasian plant of the genus Conium; "Socrates refused to flee and died by drinking hemlock"phytotoxin, plant toxin - any substance produced by plants that is similar in its properties to extracellular bacterial toxin
2.hemlock - large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowershemlock - large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers; usually found in damp habitats; all parts extremely poisonousCalifornia fern, Conium maculatum, Nebraska fern, poison hemlock, poison parsley, winter fernConium, genus Conium - small genus of highly toxic biennials: hemlockpoisonous plant - a plant that when touched or ingested in sufficient quantity can be harmful or fatal to an organism
3.hemlock - soft coarse splintery wood of a hemlock tree especially the western hemlockhemlock tree, hemlock - an evergreen treewood - the hard fibrous lignified substance under the bark of trees
4.hemlock - an evergreen treehemlock - an evergreen tree hemlock treegenus Tsuga, Tsuga - hemlock; hemlock fir; hemlock sprucehemlock - soft coarse splintery wood of a hemlock tree especially the western hemlockCanadian hemlock, eastern hemlock, spruce pine, Tsuga canadensis - common forest tree of the eastern United States and Canada; used especially for pulpwoodCarolina hemlock, Tsuga caroliniana - medium-sized evergreen of southeastern United States having spreading branches and widely diverging cone scalesblack hemlock, mountain hemlock, Tsuga mertensiana - large evergreen of western United States; wood much harder than Canadian hemlockPacific hemlock, Tsuga heterophylla, west coast hemlock, western hemlock - tall evergreen of western North America; commercially important timber treeconifer, coniferous tree - any gymnospermous tree or shrub bearing cones
Translations

hemlock


hemlock,

any tree of the genus Tsuga, coniferous evergreens of the family Pinaceae (pinepine,
common name for members of the Pinaceae, a family of resinous woody trees with needlelike, usually evergreen leaves. The Pinaceae reproduce by means of cones (see cone) rather than flowers and many have winged seeds, suitable for wind distribution.
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 family) native to North America and Asia. The common hemlock of E North America is the eastern hemlock, T. canadensis, an ornamental tree (sometimes cultivated as a hedge) with small cones and short, dark green leaves so arranged as to give the branchlets a flattened appearance. Found from the S Appalachians to N Wisconsin and SE Canada, the tree has been highly valued as a source of tanbark but is now seriously reduced in number. Its wood is soft and light. The Carolina hemlock, T. caroliniana, found on the slopes of the S Appalachians, is grown as an ornamental. Both trees are threatened by the hemlock woolly adelgid, an insect that is native to E Asia and was first found in their range in the 1960s. The western hemlock, T. heterophylla, is the tallest tree of the genus. Found along the coast from S Alaska to N California, it has more valuable wood, which is used in construction work. The mountain hemlock, T. mertensiana, has a similar range but is found inland S of Canada. Both western species are grown as ornamentals. The ground hemlock is a species of yewyew,
name for evergreen trees or shrubs of the genus Taxus, somewhat similar to hemlock but bearing red berrylike fruits instead of true cones. Of somber appearance, with dark green leaves, the yew since antiquity has been associated with death and funeral rites.
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. The poison hemlockpoison hemlock,
lethally poisonous herbaceous plant (Conium maculatum) of the family Umbelliferae (parsley family). It has rank, finely divided foliage, flat-topped clusters of small white flowers, and a hollow, purple-mottled stem.
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 and water hemlock are herbs of the family Umbelliferae (carrotcarrot,
common name for some members of the Umbelliferae, a family (also called the parsley family) of chiefly biennial or perennial herbs of north temperate regions. Most are characterized by aromatic foliage, a dry fruit that splits when mature, and an umbellate inflorescence
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 family) of the division MagnoliophytaMagnoliophyta
, division of the plant kingdom consisting of those organisms commonly called the flowering plants, or angiosperms. The angiosperms have leaves, stems, and roots, and vascular, or conducting, tissue (xylem and phloem).
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. True hemlock is classified in the division PinophytaPinophyta
, division of the plant kingdom consisting of those organisms commonly called gymnosperms. The gymnosperms, a group that includes the pine, have stems, roots and leaves, and vascular, or conducting, tissue (xylem and phloem).
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, class Pinopsida, order Coniferales, family Pinaceae.

hemlock

Wood of a coniferous tree; moisture-resistant, soft, coarse, and uneven-textured; it splinters easily and is inferior for construction use. See also: Douglas fir

Hemlock

 

the common name for North American species of trees of the genus Tsuga of the family Pinaceae. The trunk has deeply furrowed exfoliative strips of bark. The crown is conical. The needles are flat and linear-lanceolate. Hemlocks are hygro-philous but do not tolerate swamping; they do not grow well in shady areas or in regions having low humidity. They tolerate trimming well and are planted singly or in groups as barriers or to line streets. The lightweight wood is not very strong and lacks resin ducts; it is used to manufacture paper and boxes. The most common species is the eastern hemlock (Tsuga canadensis).

hemlock

[′hem‚läk] (botany) The common name for members of the genus Tsuga in the pine family characterized by two white lines beneath the flattened, needlelike leaves.

hemlock

Wood of a coniferous tree of the US. Also see eastern hemlock, western hemlock.

hemlock

1. an umbelliferous poisonous Eurasian plant, Conium maculatum, having finely divided leaves, spotted stems, and small white flowers 2. a poisonous drug derived from this plant 3. any coniferous tree of the genus Tsuga, of North America and E Asia, having short flat needles: family Pinaceae 4. the wood of any of these trees, used for lumber and as a source of wood pulp

hemlock


co·ni·um

(kō-nē'ŭm), The dried unripe fruit of Conium maculatum (family Umbelliferae), also known as spotted cowbane or spotted parsley; it has been used as a sedative, antispasmodic, and anodyne. Synonym(s): hemlock [L. fr. G. kōneion, hemlock]

hemlock

(hĕm′lŏk′)n.a. Any of several poisonous plants of the genera Conium and Cicuta of the parsley family, such as the poison hemlock.b. A poison obtained from the poison hemlock.
Any of the poisonous herbs of the carrot family, especially Conium maculatum, but also Tsuga spp, which contain an alkaloid, conine, that evokes CNS hyperactivity, followed by medullary depression and respiratory failure
Management Activated charcoal

hemlock

Toxicology Any of the poisonous herbs of the carrot family, especially Conium maculatum, but also Tsuga spp, which contain an alkaloid, conine, that evokes CNS hyperactivity, followed by medullary depression and respiratory failure Treatment Activated charcoal

hemlock


Related to hemlock: hemlock tree, Conium maculatum
  • noun

Synonyms for hemlock

noun poisonous drug derived from an Eurasian plant of the genus Conium

Related Words

  • phytotoxin
  • plant toxin

noun large branching biennial herb native to Eurasia and Africa and adventive in North America having large fernlike leaves and white flowers

Synonyms

  • California fern
  • Conium maculatum
  • Nebraska fern
  • poison hemlock
  • poison parsley
  • winter fern

Related Words

  • Conium
  • genus Conium
  • poisonous plant

noun soft coarse splintery wood of a hemlock tree especially the western hemlock

Related Words

  • hemlock tree
  • hemlock
  • wood

noun an evergreen tree

Synonyms

  • hemlock tree

Related Words

  • genus Tsuga
  • Tsuga
  • hemlock
  • Canadian hemlock
  • eastern hemlock
  • spruce pine
  • Tsuga canadensis
  • Carolina hemlock
  • Tsuga caroliniana
  • black hemlock
  • mountain hemlock
  • Tsuga mertensiana
  • Pacific hemlock
  • Tsuga heterophylla
  • west coast hemlock
  • western hemlock
  • conifer
  • coniferous tree
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