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Noun sac has 4 senses
- pouch, sac, sack, pocket - an enclosed space; "the trapped miners found a pocket of air"
--1 is a kind of cavity, enclosed space
- theca, sac - a case or sheath especially a pollen sac or moss capsule
--2 is a kind of covering, natural covering, cover
- Sauk, Sac - a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay
--3 is a kind of Algonquian, Algonquin
--3 has particulars: Black Hawk, Makataimeshekiakiak; Keokuk
- sac - a structure resembling a bag in an animal
--4 is a kind of cavity, bodily cavity, cavum
--4 has particulars:
| ||yolk sac; yolk sac, vitelline sac, umbilical vesicle, vesicula umbilicus; amnion, amniotic sac, amnios; chorion; coelenteron; air bladder, swim bladder; air sac; air sac; saccule, sacculus; bladder, vesica; acinus; bursa; cisterna, cistern; pouch, pocket; vesicle, cyst; alveolus, air sac, air cell; pericardial sac|