synadelphus

syn·a·del·phus

(sin'ă-del'fŭs), Conjoined twins with single head, partially united trunk, and four upper and four lower limbs. See: conjoined twins. [syn- + G. adelphos, brother]

synadelphus

S26-925620 (sĭn″ă-dĕl′fŭs) [″ + adelphos, brother] A deformed fetus with eight limbs.