/ Dictionary / Index M maxilla: Meaning and Definition of Find definitions for: max•il•la Pronunciation: (mak-sil'u), [key] — pl. max•il•lae a jaw or jawbone, esp. the upper. one of the paired appendages immediately behind the mandibles of arthropods. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: maxilla (Thesaurus) maxi maxillary Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language