/ Dictionary / Index S Spanish fly: Meaning and Definition of Find definitions for: Span'ish fly' Pronunciation: [key] Also calleda preparation of powdered blister beetles, esp. the Spanish fly, used medicinally as a counterirritant, diuretic, and aphrodisiac. Also calleda common European blister beetle, Cantharis (Lytta) vesicatoria, that yields this preparation. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Spanish dagger Spanish foot Related Content Daily Word Quiz: nefarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language