/ Dictionary / Index S spp.: Meaning and Definition of Find definitions for: spp. Pronunciation: [key] species (pl. of). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. spouting S.P.Q.R. Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language