epipygus

Unequal conjoined twins in which the smaller, incomplete parasite is attached to the buttock of the larger autosite. ... See: pygomelus, conjoined twins. ... Origin: epi-+ G. Pyge, buttocks ... (05 Mar 2000) ...
Found on http://www.mondofacto.com/facts/dictionary?epipygus

epipygus

Type: Term Pronunciation: ep′i-pī′gŭs Definitions: 1. Unequal conjoined twins in which the smaller, incomplete parasite is attached to the buttock of the larger autosite. See: pygomelus, conjoined twins, under twin
Found on http://www.medilexicon.com/medicaldictionary.php?t=29883
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