sac

English Thesaurus

1. a structure resembling a bag in an animal (noun.body)

hypernym	:	bodily cavity, cavity, cavum,
definition	:	(anatomy) a natural hollow or sinus within the body (noun.body)

hyponym	:	yolk sac,
definition	:	membranous structure enclosing the yolk of eggs in birds, reptiles, marsupials, and some fishes; circulates nutrients to the developing embryo (noun.animal)

hyponym	:	umbilical vesicle, vesicula umbilicus, vitelline sac, yolk sac,
definition	:	membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional (noun.animal)

hyponym	:	amnion, amnios, amniotic sac,
definition	:	thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals) (noun.animal)

hyponym	:	chorion,
definition	:	the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals) (noun.animal)

hyponym	:	coelenteron,
definition	:	the saclike body cavity of a coelenterate (noun.animal)

hyponym	:	air bladder, float, swim bladder,
definition	:	an air-filled sac near the spinal column in many fishes that helps maintain buoyancy (noun.animal)

hyponym	:	air sac,
definition	:	any of the membranous air-filled extensions of the lungs of birds (noun.animal)

hyponym	:	air sac,
definition	:	any of the thin-walled extensions of the tracheae of insects (noun.animal)

hyponym	:	saccule, sacculus,
definition	:	a small sac or pouch (especially the smaller chamber of the membranous labyrinth) (noun.body)

hyponym	:	bladder, vesica,
definition	:	a distensible membranous sac (usually containing liquid or gas) (noun.body)

hyponym	:	acinus,
definition	:	one of the small sacs or saclike dilations in a compound gland (noun.body)

hyponym	:	bursa,
definition	:	a small fluid-filled sac located between movable parts of the body especially at joints (noun.body)

hyponym	:	cistern, cisterna,
definition	:	a sac or cavity containing fluid especially lymph or cerebrospinal fluid (noun.body)

hyponym	:	pocket, pouch,
definition	:	(anatomy) saclike structure in any of various animals (as a marsupial or gopher or pelican) (noun.body)

hyponym	:	cyst, vesicle,
definition	:	a small anatomically normal sac or bladderlike structure (especially one containing fluid) (noun.body)

hyponym	:	air cell, air sac, alveolus,
definition	:	a tiny sac for holding air in the lungs; formed by the terminal dilation of tiny air passageways (noun.body)

hyponym	:	pericardial sac,
definition	:	the membrane surrounding the heart (noun.body)

2. a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay (noun.person)

hypernym	:	algonquian, algonquin,
definition	:	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 (noun.person)

instance hyponym	:	black hawk, makataimeshekiakiak,
definition	:	Sauk leader who in 1832 led Fox and Sauk warriors against the United States (1767-1838) (noun.person)

instance hyponym	:	keokuk,
definition	:	Sauk leader who aided the United States against Black Hawk (1790-1848) (noun.person)

3. a case or sheath especially a pollen sac or moss capsule (noun.plant)

hypernym	:	cover, covering, natural covering,
definition	:	a natural object that covers or envelops (noun.object)

4. an enclosed space (noun.shape)

hypernym	:	cavity, enclosed space,
definition	:	space that is surrounded by something (noun.shape)