/ Dictionary / Index E Eustachio: Meaning and Definition of Find definitions for: E•u•sta•chio Pronunciation: (e"-stä'kyô), [key] 1524?–1574, Italian anatomist. Latin, Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: eustachio (Thesaurus) Eustachian tube Eustacia Related Content Daily Word Quiz: loathe Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language