pygo-, pyg-, -pyga, -pygia (Greek: rump, buttocks, bottom; rear end; butt; the posterior part of the body).callimammapygian: 
Having beautiful breasts and buttocks.
 
callipygia, callipygian, callipygous, callipygy: 
Having "beautiful" or sexy buttocks or a reference to such.
 
dasypygal: 
Having hairy buttocks; rough bottomed.
 
hypopygial, hypopygium: 
In entomology, situated under the end of the adomen.
 
macropygia: 
An excessively large rear-end or back-side.
 
ovopygian: 
Having elongated or ovid buttocks.
 
planopygian: 
Having flat buttocks.
 
platypygous: 
Having broad buttocks.
 
pleopygian: 
Having bulging buttocks.
 
pygal: 
Of or pertaining to the rump or hinder quarters of an animal.
 
pygalgia: 
Soreness in the buttocks, i.e., a pain in the rump.
 
pygia: 
A reference to buttocks.
 
pygidium (singular); pygidia (plural); pygidial: The posterior part of the body in certain invertebrates, chiefly insects, crustaceans, and worms, when forming a distinct segment or division; the caudal or pygal segment.
pygobombes: 
Men or women with sexy, well-rounded rumps.
 
pygobranchia, pygobranchiate, phgobranchious: 
A group of gastropods having the gills arranged round the anus.
 
pygodidymus: 
A fetus with double hips and pelvis.
 
pygopagous, pygopagus: 
Twins united in the region of the buttocks so that the two are back to back.
 
pygophilist: 
A person who is especially fond of buttocks.
 
pygophilous, pygophily: 
1. Loving sexy buttocks. Having a special attraction for female buttocks.
 
pygopod, pygopodous: 
Of or pertaining to the Pygopodes, an order of aquatic birds, including the auks, grebes, and loons, having the legs set very far to the back.
 
pygotripsis: 
The rubbing of the buttocks as a means of deriving sexual pleasure.
 
quatopygia: 
An enticing movement of a man or woman's rear end.
 
spheropygian: 
Having rounded and full buttocks.
 
steatopygia, steatopygian, steatopygic, steatopygous, steatopygy: 
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 peoples; especially, the Hottentots and Bushmen of South Africa. uropygial: 
In ornithology, situated on, belonging to, the rump or uropygium.
 
uropygium: 
In ornithology, the rump of birds.
 
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