An apparently headless placental parasitic twin that, however, has rudimentary cephalic structures that can be demonstrated by dissection.
[pseudo- + G. a- priv. + kephalē, head]
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pseudoacephalus(soo″dō-ā-sĕf′ă-lŭs) [″ + a-, not, + kephale, head]
A parasitic twin that has a rudimentary cranium.
Medical Dictionary, © 2009 Farlex and Partners