sac

Noun
  1. An enclosed space (synset 113937488)
    "the trapped miners found a pocket of air"
    is a type of: cavity, enclosed space - space that is surrounded by something
    same as: pocket, pouch, sack
  2. A case or sheath especially a pollen sac or moss capsule (synset 113113481)
    is a type of: cover, covering, natural covering - a natural object that covers or envelops
    same as: theca
  3. A member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay (synset 109687420)
    is a type of: algonquian, algonquin - a member of any of the North American Indian groups speaking an Algonquian language and originally living in the subarctic regions of eastern Canada; many Algonquian tribes migrated south into the woodlands from the Mississippi River to the Atlantic coast
    specific instances:
    • black hawk, makataimeshekiakiak - Sauk leader who in 1832 led Fox and Sauk warriors against the United States (1767-1838)
    • keokuk - Sauk leader who aided the United States against Black Hawk (1790-1848)
    same as: sauk
  4. A structure resembling a bag in an animal (synset 105523321)
    is a type of: bodily cavity, cavity, cavum - (anatomy) a natural hollow or sinus within the body
    subtypes:
    • yolk sac - membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo
    • umbilical vesicle, vesicula umbilicus, vitelline sac, yolk sac - membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
    • amnion, amnios, amniotic sac - thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
    • chorion - the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
    • coelenteron - the saclike body cavity of a coelenterate
    • air bladder, float, swim bladder - an air-filled sac near the spinal column in many fishes that helps maintain buoyancy
    • air sac - any of the membranous air-filled extensions of the lungs of birds
    • air sac - any of the thin-walled extensions of the tracheae of insects
    • saccule, sacculus - a small sac or pouch (especially the smaller chamber of the membranous labyrinth)
    • bladder, vesica - a distensible membranous sac (usually containing liquid or gas)
    • acinus - one of the small sacs or saclike dilations in a compound gland
    • bursa - a small fluid-filled sac located between movable parts of the body especially at joints
    • cistern, cisterna - a sac or cavity containing fluid especially lymph or cerebrospinal fluid
    • pocket, pouch - (anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican)
    • cyst, vesicle - a small anatomically normal sac or bladderlike structure (especially one containing fluid)
    • air cell, air sac, alveolus - a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways
    • pericardial sac - the membrane surrounding the heart

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