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sheath 音標拼音: [ʃ'iθ] n. 鞘,葉鞘,翅鞘 鞘,葉鞘,翅鞘 sheath外皮; 外層覆蓋物 sheath n 1: a protective covering ( as for a knife or sword) 2: an enveloping structure or covering enclosing an animal or plant organ or part [ synonym: { sheath}, { case}] 3: a dress suitable for formal occasions [ synonym: { cocktail dress}, { sheath}] Sheath \ Sheath\, n. [ OE. schethe, AS. sc[= ae][ eth], sce[' a][ eth], sc[= e][ eth]; akin to OS. sk[= e][ eth] ia, D. scheede, G. scheide, OHG. sceida, Sw. skida, Dan. skede, Icel. skei[ eth] ir, pl., and to E. shed, v. t., originally meaning, to separate, to part. See { Shed}.] 1. A case for the reception of a sword, hunting knife, or other long and slender instrument; a scabbard. [ 1913 Webster] The dead knight' s sword out of his sheath he drew. -- Spenser. [ 1913 Webster] 2. Any sheathlike covering, organ, or part. Specifically: ( a) ( Bot.) The base of a leaf when sheathing or investing a stem or branch, as in grasses. ( b) ( Zool.) One of the elytra of an insect. [ 1913 Webster] { Medullary sheath}. ( Anat.) See under { Medullary}. { Primitive sheath}. ( Anat.) See { Neurilemma}. { Sheath knife}, a knife with a fixed blade, carried in a sheath. { Sheath of Schwann}. ( Anat.) See { Schwann' s sheath}. [ 1913 Webster] 31 Moby Thesaurus words for " sheath": Leatherette, Leatheroid, case, casing, coat, cuticle, dermis, encasement, fell, fleece, flesh, fur, furring, hide, imitation fur, imitation leather, integument, jacket, leather, leather paper, outer layer, outer skin, pelt, peltry, rawhide, rind, sheathing, skin, skins, tegument, vair
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