| Gadfly (n.) Any dipterous insect of the genus Oestrus, and allied genera of botflies. Thesaurus Entries abettor, actuator, animator, cajoler, coax, coaxer, encourager, energizer, firer, gad, galvanizer, goad, impeller, inducer, inspirer, lash, mover, moving spirit, oxgoad, persuader, pleader, prick, prime mover, prod, prompter, rowel, spark, spark plug, sparker, spur, stimulator, sting, tempter, wheedler, whip, whiplash |