Толковый словарь английского языка Oxford English Reference - sheath

n. (pl. sheaths) 1 a close-fitting cover, esp. for the blade of a knife or sword. 2 a condom. 3 Bot., Anat., & Zool. an enclosing case or tissue. 4 the protective covering round an electric cable. 5 a woman's close-fitting dress. Phrases and idioms sheath knife a dagger-like knife carried in a sheath. Derivatives sheathless adj. Etymology: OE sc{aelig}th, sceath