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1.
cal·li·pyg·i·an (kl-pj-n) also cal·li·py·gous (-pgs)
adj. Having beautifully proportioned buttocks.

From Greek kallipugos : kalli-, beautiful (from kallos, beauty) + pug, buttocks.
Adonis, having callipygean attributes, donned a magnificent countenance as well.
by Documentation Goddess April 17, 2008
 
2.
cal·li·pyg·i·an (kl-pj-n) also cal·li·py·gous (-pgs)
adj. Having beautifully proportioned buttocks.

From Greek kallipugos : kalli-, beautiful (from kallos, beauty) + pug, buttocks.
Adonis, having callipygean attributes, donned a magnificent countenance as well.
by Documentation Goddess April 17, 2008