from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any of various herbivorous ornithiscian dinosaurs of the group Marginocephalia of the Cretaceous Period, characterized by a bony shelf or frill at the back of the skull and including the ceratopsians and the pachycephalosaurians.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective zoology Of or relating to the Marginocephalia, a
cladeof ornithischian dinosaurs.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun includes boneheaded (pachycephalosaurs) and horned (ceratopsian) dinosaurs
from The American Heritage® Dictionary of the English Language, 4th Edition
[From New Latin Marginocephalia, group name : Latin margō, margin-, margin; see margin + Greek kephalē, head; see cephalic.]
from Wiktionary, Creative Commons Attribution/Share-Alike License
Marginocephalia + -an
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