/ Dictionary / Index A Argentine ant: Meaning and Definition of Find definitions for: Ar'gentine ant' Pronunciation: [key] a small brown ant, Iridomyrmex humilis, introduced into the southern U.S. from South America: a household and fruit pest. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. argentine argentite Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language