Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A compound bone with winglike processes, situated at the base of the skull.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A compound bone at the base of the
skull behind the eyes.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun butterfly-shaped bone at the base of the skull
Etymologies
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Examples
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biocon commented on the word sphenoid bone
The appearance of this bone at the base of the cranium evokes in my mind an image of a flying bat rather than a flying butterfly.
August 26, 2011