the buttock is a form of:

Buttock



noun
1.
(either of the two fleshy rounded parts at the lower end of the back of the hips) ថ្ពាល់ក្ដិត, គូទ
2.
(វេជ្ជសាស្ត្រ) គូថ
ENGLISH MEANING
noun
1.
The part at the back of the hip, which, in man, forms one of the rounded protuberances on which he sits; the rump.
2.
The convexity of a ship behind, under the stern.