[1] : The Collaborative International Dictionary of English v.0.48

buttock \but"tock\, n. from butt an end.
   1. the part at the back of the hip, which, in man, forms one
      of the rounded protuberances on which he sits; the rump.
      often used in the plural -- see buttocks.

   syn: cheek.
        1913 webster

   2. naut. the convexity of a ship behind, under the stern.
      --mar. dict.
      1913 webster
see also:
butt buttocks 

[2] : WordNet (r) 2.0

buttock
     n : either of the two large fleshy masses of muscular tissue
         that form the human rump syn: cheek
see also:
cheek 

Buttock >> B Words
Buttock, definition of term: Buttock
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