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Meaning of ammonium

am•mo•ni•um

Pronunciation: (u-mō'nē-um), [key]
— n. Chem.
  1. the univalent ion, NH, or group, NH, which plays the part of a metal in the salt formed when ammonia reacts with an acid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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