/ Dictionary / Index I infraspecific: Meaning and Definition of Find definitions for: in•fra•spe•cif•ic Pronunciation: (in"fru-spi-sif'ik), [key] — adj. of or pertaining to a subdivision of a species, as a subspecies, variety, or cultivar. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. infrasound infrastructure Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language