sheath /ˈʃiθ/
 鞘,葉鞘,翅鞘


 sheath /ˈʃɪθ/ 名詞
 鞘,護套,屏極


 sheath
 外皮; 外層覆蓋物


 Sheath n.
 1. A case for the reception of a sword, hunting knife, or other long and slender instrument; a scabbard.
    The dead knight's sword out of his sheath he drew.   --Spenser.
 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.
 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.

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 sheath
      n 1: a protective covering for a knife or sword
      2: an enveloping structure or covering enclosing an animal or
         plant organ or part [syn: case]
      3: a dress suitable for formal occasions [syn: cocktail dress]