/ Dictionary / Index A anhydrite: Meaning and Definition of Find definitions for: an•hy•drite Pronunciation: (an-hī'drīt), [key] — n. a mineral, anhydrous calcium sulfate, CaSO, usually occurring in whitish or slightly colored masses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. anhydride anhydro- Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language