| 单词 | sheath |
| 释义 | sheath (once / 1671 pages) 1n 2n 3n A sheath is a protective case for a knife or a sword. The most exciting part of a staged sword fight might be the moment when the hero pulls his weapon out of its sheath. A sheath is also a dress that is straight, fitted, and simple. You might advise your Aunt Martha to choose a sheath dress for her third wedding, instead of the white lace gown with the long train. The word sheath most likely comes from the Old English scēath, meaning a divide or a split, like the split piece of wood which originally served as a sword's sheath. WORD FAMILYsheath: sheaths USAGE EXAMPLESThe fall was caused by a peripheral nerve sheath tumor and led to several weeks in the hospital. Washington Times(Dec 31, 2016) A shimmering sleeveless sheath in rose and silvery gray, it was pretty universally considered a fashion slam dunk. Seattle Times(Dec 23, 2016) It destroys the protective coating that wraps round nerves called the myelin sheath. BBC(Dec 21, 2016) 1 n a protective covering (as for a knife or sword) 2Hypo|Hyper aglet, aiglet metal or plastic sheath over the end of a shoelace or ribbon cot, fingerstalla sheath worn to protect a finger holstera sheath (usually leather) for carrying a handgun scabbarda sheath for a sword or dagger or bayonet shoulder holstera holster worn over your shoulder so a gun can be concealed under your jacket protection, protective cover, protective covering a covering that is intend to protect from damage or injury n an enveloping structure or covering enclosing an animal or plant organ or part 3Syn|Hypo|Hyper case theca outer sheath of the pupa of certain insects loricaa hard protective sheath (as secreted by certain protoctists, for example) medullary sheath, myelin sheatha layer of myelin encasing (and insulating) the axons of medullated nerve fibers neurilemma, neurolemmathin membranous sheath around a nerve fiber huskouter membranous covering of some fruits or seeds cornhuskthe husk of an ear of corn hulldry outer covering of a fruit or seed or nut cod, pod, seedcasethe vessel that contains the seeds of a plant (not the seeds themselves) bracta modified leaf or leaflike part just below and protecting an inflorescence cover, covering, natural covering a natural object that covers or envelops n a dress suitable for formal occasions Syn|Hyper cocktail dress dress, frock a one-piece garment for a woman; has skirt and bodice |
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