/ Dictionary / Index S sandfly: Meaning and Definition of Find definitions for: sand•fly Pronunciation: (sand'flī"), [key] — pl. -flies. any of several small, bloodsucking, dipterous insects of the family Psychodidae that are vectors of several diseases of humans. any of several other small, bloodsucking, dipterous insects, as one of the family Heleidae or Simuliidae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sandfly (Thesaurus) sand-floated sandfly fever Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language