a. [ Gr. &unr_; highest + &unr_;. See Cephalic. ] Characterized by a high skull. [ 1913 Webster ]

a. [ Macro + Gr. kefalh` the head. ] 1. Of or pertaining to macrocephaly; having an unusually large head. [ 1913 Webster ]

2. (Bot.) Having the cotyledons of a dicotyledonous embryo confluent, and forming a large mass compared with the rest of the body. Henslow. [ 1913 Webster ]