/ Dictionary / Index F formicary: Meaning and Definition of Find definitions for: for•mi•car•y Pronunciation: (fôr'mi-ker"ē), [key] — pl. -car•ies. an ant nest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: formicary (Thesaurus) formicarium formication Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language