pyg-, pygo-, -pyga, -pygia

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

Callipygian Venus
Venus, thought to be more beautiful than any mortal woman, is a sculpture called Callipygian, meaning "of the beautiful bottom" or "of the beautiful backside". The late Hellenistic original once stood at the center of a pool in Nero’s Domus Aurea in Rome.
Callipygian Venus statue
In entomology, situated under the end of the adomen.
An excessively large rear-end or back-side.
Having elongated or ovid buttocks.
Having flat buttocks.
Having broad buttocks.
Having bulging buttocks.
pygal (adjective), more pygal, most pygal
Of or pertaining to the rump or hind quarters of an animal.
pygalgia (s) (noun) (no pl)
Outdated, soreness in the buttocks, i.e., a pain in the rump: Janet read that there were various reasons for pygalgia, or the suffering in the gluteus maximus, including an injury, a nerve compression, and overuse conditions.

Pygalgia is related to proctalgia, or pain in the rectum.

Showing or revealing one's bare buttocks in some public situation; "mooning".
A reference to buttocks.
pygidial (adjective), more pygidial, most pygidial
Characteristic of the back region of certain invertebrates.
pygidium (s) (noun), pygidia (pl)
1. The posterior or back part of the body in certain invertebrates, primarily insects, crustaceans, and worms, when forming a distinct segment or division.
2. Etymology: from New Latin which came from Greek pugidion; from puge, "rump".

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