/ Dictionary / Index T tetrahydrate: Meaning and Definition of Find definitions for: tet•ra•hy•drate Pronunciation: (te"tru-hī'drāt), [key] — n. Chem. a hydrate that contains four molecules of water, as potassium sodium tartrate, KNaCHO&raiseddot;4HO. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tetrahedron tetrahydric Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language