/ Dictionary / Index E ethmoid: Meaning and Definition of Find definitions for: eth•moid Pronunciation: (eth'moid), [key] — Anat. Anat. —adj. of or pertaining to a bone at the base of the cranium and the root of the nose, containing numerous perforations for the filaments of the olfactory nerve. —n. the ethmoid bone. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ethmoid (Thesaurus) Ethiopic ethnarch Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language