Of, pertaining to, or having well-shaped or finely developed buttocks.
From the
Greek 'beauty' + 'buttocks', also the name of a
famous statue of Venus
1648
Sir T. Browne Pseud. Ep. Calliphygae
nd women largely composed behinde.
1800 The Calliphygian Venus
1885 Athenaeum The Calliphygian luxuriance he so deplores