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noun

ammonium

the ion NH4 derived from ammonia; behaves in many respects like an alkali metal ion

In a sentence

Six example sentences with ammonium, each labelled with its topic.

  • Old Scandinavian recipes call for ammonium carbonate, a leavening powder that puffs thin cookies far crisper than baking soda.

    Cooking

  • Runoff from the dairy raised ammonium levels in the creek until algae smothered the trout spawning beds.

    Environment

  • Fertilizer plants combine hydrogen and nitrogen to make the ammonium salts that crops absorb through their roots.

    Science

  • The old zinc carbon cell used a paste of ammonium chloride, and the leaks that ruined toys came from that paste.

    Technology

  • Rapid fixer uses an ammonium salt rather than a sodium one, so the print clears in half the time.

    Photography

  • Smelling salts release a pungent gas from an ammonium carbonate, and the sharp jolt was once used to rouse fainting patients.

    Medicine

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Found in these word lists

Each source is a published word list that contains ammonium. No exam board publishes an official GRE, GMAT or SAT list; GMAT words come from GRE lists and the Academic Word List.

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