ethmoidPronunciation: /ˈɛθmɔɪd/ (also ethmoid bone)Definition of ethmoid noun Anatomy a square bone at the root of the nose, forming part of the cranium, and having many perforations through which the olfactory nerves pass to the nose: [as modifier]:ossification in the ethmoid regionDerivatives ethmoidalPronunciation: /-ˈmɔɪd(ə)l/ adjective Origin: mid 18th century: from Greek ēthmoeidēs, from ēthmos 'a sieve'ethmoid in other Oxford dictionaries Definition of ethmoid in the US English dictionary
