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(), n.[OE. schethe, AS. sc, sce, sc; akin to OS. skia, D. scheede, G. scheide, OHG. sceida, Sw. skida, Dan. skede, Icel. skeiir, 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. 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) (Zol.) 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. スポンサード リンク
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