Here you will find one or more explanations in English for the word Megacephalous.
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Megacephalous
Megacephalic Meg`a*ce*phal"ic, Megacephalous
Meg`a*ceph"a*lous, a. [Mega- + Gr. kefalh` head.] (Biol.)
Large headed; -- applied to animals, and to plants when they
have large flower heads.
Meaning of Megacephalous from wikipedia