Ethmoid

a.	1.	(Anat.) Like a sieve; cribriform. 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.
n.	1.	(Anat.) The ethmoid bone.

Noun

1.

ethmoid - 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 Synonyms: ethmoid bone

bone, braincase, brainpan, cranium, ethmoid bone, os