sheath

Noun
  1. A protective covering (as for a knife or sword) (synset 104194104)
    is a type of: protection, protective cover, protective covering - a covering that is intend to protect from damage or injury
    subtypes:
    • aglet, aiglet - metal or plastic sheath over the end of a shoelace or ribbon
    • cot, fingerstall - a sheath worn to protect a finger
    • holster - a sheath (usually leather) for carrying a handgun
    • scabbard - a sheath for a sword or dagger or bayonet
  2. An enveloping structure or covering enclosing an animal or plant organ or part (synset 105245366)
    is a type of: cover, covering, natural covering - a natural object that covers or envelops
    subtypes:
    • theca - outer sheath of the pupa of certain insects
    • lorica - a hard protective sheath (as secreted by certain protoctists, for example)
    • medullary sheath, myelin sheath - a layer of myelin encasing (and insulating) the axons of medullated nerve fibers
    • neurilemma, neurolemma - thin membranous sheath around a nerve fiber
    • husk - outer membranous covering of some fruits or seeds
    same as: case
  3. A dress suitable for formal occasions (synset 103066018)
    is a type of: dress, frock - a one-piece garment for a woman; has skirt and bodice
    same as: cocktail dress

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