The Collaborative International Dictionary
Ethmoid \Eth"moid\, Ethmoidal \Eth*moid"al\, a. [Gr. ? like a sieve; ? sieve + ? from: cf. F. ethmo["i]de, ethmo["i]dal.] (Anat.)
Like a sieve; cribriform.
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Pertaining to, or in the region of, the ethmoid bone.
Ethmoid bone (Anat.), a bone of complicated structure through which the olfactory nerves pass out of the cranium and over which they are largely distributed.
Wiktionary
n. The bone of the skull between the eyes and at the roof of the nose.
WordNet
n. one of the eight bones of the cranium; a small bone filled with air spaces that forms part of the eye sockets and the nasal cavity [syn: ethmoid]
Wikipedia
The ethmoid bone (; from Greek ethmos, "sieve") is an unpaired bone in the skull that separates the nasal cavity from the brain. It is located at the roof of the nose, between the two orbits. The cubical bone is lightweight due to a spongy construction. The ethmoid bone is one of the bones that make up the orbit of the eye.
Usage examples of "ethmoid bone".
One of the KGB guards was lunging for him, Rourke's left foot snapping up and out, against the muzzle of the M-16, kicking it to Rourke's left, Rourke's right hand hammering forward, the middle knuckles finding the adam's apple, crushing the windpipe, blood gushing from the man's mouth through his clenched teeth, Rourke's fist snapping back, then forward, the middle knuckles impacting the base of the nose, driving the bone up and through the ethmoid bone and into the brain.