A grossly malformed fetus with three heads, joined at the occiput, and a single body.
[tri- + G. inion, nape of the neck, + didymos, twin]
Farlex Partner Medical Dictionary © Farlex 2012
triiniodymus(trī″ĭn-ē-ŏd′ĭ-mŭs) [″ + inion, nape of the neck, + didymos, twin]
A deformed fetus with a single body and three heads joined at the occiput.
Medical Dictionary, © 2009 Farlex and Partners