/ Dictionary / Index A arista: Meaning and Definition of Find definitions for: a•ris•ta Pronunciation: (u-ris'tu), [key] — pl. -tae a bristlelike appendage of the spikelets of grains or grasses; an awn. a prominent bristle on the antenna of some dipterous insects. A•ris•ta Pronunciation: (ä-rēs'tä), [key] 1802–55, Mexican general: president of Mexico 1851–53. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arista (Thesaurus) arise aristarch Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language