dipygus

dipygus

 [di-pi´gus]
a malformed fetus with a double pelvis.

di·py·gus

(dī-pī'gŭs, dip'ē-gŭs),
Conjoined twins with a single head and thorax and the pelvis and lower extremities duplicated; when the duplications of the lower parts are symmetric, usually called duplicitas posterior. See: conjoined twins.
[G. di-, two, + pyge, buttocks]

dipygus

[dīpī′gəs, dip′əgəs]
Etymology: Gk, di, twice, pyge, rump
a malformed fetus that has a double pelvis, one of which is usually not fully developed.

dipygus

a fetus with a double pelvis.