/ Dictionary / Index I infusorial: Meaning and Definition of Find definitions for: in•fu•so•ri•al Pronunciation: (in"fyoo-sôr'ē-ul, -sōr'-), [key] — adj. pertaining to, containing, or consisting of infusorians: infusorial earth. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Infusoria infusorian 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