sac

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A pouch or pouchlike structure in a plant or an animal, sometimes filled with fluid.

Century Dictionary and Cyclopedia

1. n. In law, the privilege enjoyed by the lord of a manor of holding courts, trying causes, and imposing fines. Also saccage.
2. n. In bot., anat., and zoology, a sack, cyst, bag, bursa, pouch, purse, or receptacle of some kind specified by a qualifying word; a saccule; a saccus.
3. n. Synonyms Sac, Saccule, Saccus, Sacculus. The first two are English, the last two Latin and only technically used, chiefly in special phrases. There is no such difference in meaning as the form of words would imply, some of the largest sacs being called saccules or sacculi, some of the smallest sacs or sacci.
4. n. A member of a tribe of Algonkin Indians, allied to the Foxes, who lived near the upper Mississippi previous to the Black Hawk war of 1832. The greater part are now on reservations.

Wiktionary

1. n. A bag or pouch inside a plant or animal that typically contains a fluid.
2. v. transitive, informal, video games To sacrifice (a creature).

GNU Webster's 1913

1. n. (Ethnol.) See sacs.
2. n. (O.Eng. Law) The privilege formerly enjoyed by the lord of a manor, of holding courts, trying causes, and imposing fines.
3. n. See 2d sack.
4. n. (Biol.) A cavity, bag, or receptacle, usually containing fluid, and either closed, or opening into another cavity to the exterior; a sack.

WordNet 3.0

1. n. an enclosed space
2. n. a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay
3. n. a structure resembling a bag in an animal
4. n. a case or sheath especially a pollen sac or moss capsule