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WordReference Random House Learner's Dictionary of American English © 2024but•tock /ˈbʌtək/USA pronunciation n. [countable] Usually, buttocks. [plural] - Anatomy, Zoology(in humans) either of the two fleshy parts of the body forming the lower and back part of the trunk:In informal English the buttocks are also called the fanny or behind.
WordReference Random House Unabridged Dictionary of American English © 2024but•tock (but′ək),USA pronunciation n. - Anatomy, ZoologyUsually, buttocks.
- (in humans) either of the two fleshy protuberances forming the lower and back part of the trunk.
- (in animals) the rump.
- Sometimes, buttocks. [Naut.]the aftermost portion of a hull above the water line and in front of the rudder, merging with the run below the water line.
- Middle English buttok, Old English buttuc. See butt1, -ock bef. 1000
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