/ Dictionary / Index A ammonium selenate: Meaning and Definition of Find definitions for: ammo'nium sel'enate Pronunciation: [key] — Chem. Chem. a colorless, crystalline, water-soluble solid, (NH)SeO, used as a mothproofing agent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ammonium salt ammonium stearate Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language