sac (n.)

"biological pocket," 1741, from French sac, from Latin saccus "bag" (see sack (n.1)).


central Algonquian people who lived near the upper Mississippi before the Black Hawk War of 1832, from French Canadian Saki, probably a shortened borrowing of Ojibwa (Algonquian) /osa:ki:/, literally "person of the outlet" (of the Saginaw River, which itself contains their name, and means literally "in the Sauk country").

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Definitions of sac from WordNet
sac (n.)
an enclosed space;
Synonyms: pouch / sack / pocket
sac (n.)
a case or sheath especially a pollen sac or moss capsule;
Synonyms: theca
sac (n.)
a structure resembling a bag in an animal;
Sac (n.)
a member of the Algonquian people formerly living in Wisconsin in the Fox River valley and on the shores of Green Bay;
Synonyms: Sauk