释义 |
acra·nia I. \(ˈ)āˈkrānēə\ noun (-s) Etymology: New Latin, from a- (II) + -crania : congenital partial or total absence of the skull II. noun plural Usage: capitalized Etymology: New Latin, from a- (II) + -crania (from Greek kranion skull) — more at cranium in some classifications : a division of Chordata comprising Hemichordata, Urochordata, and Cephalochorda and including all the chordates without true heads and anterior brains — compare vertebrata III. Etymology: New Latin, from a- (II) + -crania (from Greek kranion skull) synonym of cephalochorda |