sheath
sheath / shē[unvoicedth]/ • n. (pl. sheaths / shē[voicedth]z; shē[unvoicedth]s/ ) a close-fitting cover for something, esp. something that is elongated in shape, in particular: ∎ a cover for the blade of a knife or sword. ∎ a structure in living tissue that closely envelops another: the fatty sheath around nerve fibers. ∎ (also sheath dress) a woman's close-fitting dress: a tight sheath of black and gold lurex. ∎ a protective covering around an electric cable. ∎ a condom.DERIVATIVES: sheath·less adj.
sheath
sheath
1. Of leaves, the base of a blade or stalk that encloses the stem.
2. (of cyanobacteria) See CAPSULE (of prokaryotes).
3. See FUNGAL SHEATH.
1. Of leaves, the base of a blade or stalk that encloses the stem.
2. (of cyanobacteria) See CAPSULE (of prokaryotes).
3. See FUNGAL SHEATH.
sheath
sheath OE. sċæð, sċeað = OS. skēðia (Du. scheede, schee), OHG. sceida (G. scheide), ON. skeiðir pl. scabbard :- Gmc. *skaiþiz, *skaiþjō, prob. f. *skaiþ- divide (see SHED1).
sheath
sheath (sheeth) n. (in anatomy) the layer of connective tissue that envelops structures such as nerves, arteries, tendons, and muscles.
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