/ Dictionary / Index R rheology: Meaning and Definition of Find definitions for: rhe•ol•o•gy Pronunciation: (rē-ol'u-jē), [key] — n. the study of the deformation and flow of matter. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rheology (Thesaurus) rheobase rheometer Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language