denoting or relating to a bone of the skull that forms part of the eye socket and the nasal cavity
noun
2.
the ethmoid bone
Word origin
C18: from Greek ēthmoeidēs like a sieve, from ēthmos sieve, from ēthein to sift
ethmoid in American English
(ˈɛθˌmɔɪd)
adjective
1.
designating or of the perforated bone or bones that form part of the septum and walls of the nasal cavity: the olfactory nerves pass through the perforations
noun
2.
an ethmoid bone
Word origin
Gr ēthmoeidēs < ēthmos, strainer, sieve (< ēthein, to strain < IE base *sē(i)-) + eidos, -oid