/ Dictionary / Index T terra alba: Meaning and Definition of Find definitions for: ter'ra al'ba Pronunciation: (al'bu, ôl'-), [key] any of various white, earthy or powdery substances, as pipe clay, gypsum, kaolin, or magnesia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. terra terrace Related Content Daily Word Quiz: eureka Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language