dipygus
noun
di·py·gus
| \ (ˈ)dī-ˈpī-gəs
, ˈdip-ə-gəs
\
, ˈdip-ə-gəs
\
plural dipygi\ -ˌgī
\
\
Medical Definition of dipygus
: a teratological fetus with a double pelvis, genitals, and extremities