pyg-, pygo-, -pyga, -pygia
(Greek: rump, bottom; rear end; behind part; the posterior or back part of the body)
2. Excessive development of fatness of the buttocks, usually seen more often in women.
3. In anthropology, a condition in certain populations in which individuals have broad masses of fat protruding from the buttocks and thighs with an additional slant to the sacrum; often noted among women of the Bushmen and Hottentot groups of Africa.
4. Etymology: from Greek steat, "solid fat" + Greek puge,"buttocks".
2. A protuberance of the buttocks, due to an abnormal accumulation of fat in and behind the hips and thighs, found (more markedly in women than in men) as a racial characteristic of certain groups of people; especially, the Hottentots and Bushmen of South Africa.
The name uropygid means "tail rump", referring to the whip-like flagellum on the end of the pygidium, a small plate made up of the last three segments of the abdominal exoskeleton.
Whip scorpions have glands near the rear of their abdomen that can spray a combination of formic and acetic acid when they are bothered.
The acetic acid gives this spray a vinegar-like smell, resulting in the common name vinegaroon.