buttocks

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buttocks

[′bəd·əks]
(anatomy)
The two fleshy parts of the body posterior to the hip joints.
(engineering)
(naval architecture)
The convex part of the stern end of a ship above the water line. Also known as counter.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.