a malformed fetus with a rudimentary head and imperfect sense organs.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
paracephalus(păr″ă-sĕf′ă-lŭs) [″ + kephale, head]
A parasitic placental twin with a small rudimentary head.
Medical Dictionary, © 2009 Farlex and Partners