from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A curved, trapezoid compound bone that forms the lower posterior part of the skull; the occipital.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The bone at the back of the skull.
from the GNU version of the Collaborative International Dictionary of English
- adj. the bone which forms the posterior segment of the skull and surrounds the great foramen by which the spinal cord leaves the cranium. In the higher vertebrates it is usually composed of four bones, which become consolidated in the adult.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a saucer-shaped membrane bone that forms the back of the skull
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