pyg-, pygo-, -pyga, -pygia

(Greek: rump, bottom; rear end; behind part; the posterior or back part of the body)

steatopyga (s) (noun) (no plural)
1. An excessive accumulation of fat on the buttocks.
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".
steatopygia
steatopygian
1. Having a fat behind or backside.
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.
steatopygic
steatopygous (adjective), more steatopygous, most steatopygous
steatopygy
Uropygi
Whip scorpian.

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.

uropygial
In ornithology, situated on, belonging to, the rump or uropygium.
uropygium
In ornithology, the rump of birds.

Word families with similar applications: "back, backside" word units: dorso- (back, on the back); lumbo- (loin, lower back); nuch- (nape of the neck).