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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Latin sal ammoniacus (“salt of Amun, ammonium chloride”), named so because it was found near the temple of (Jupiter) Ammon in Egypt. Ammon derives from Ancient Greek Ἄμμων (Ámmōn), from Egyptian jmn (i-mn:n-A4).
ammonia water, ammonium hydroxide
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Classic usage
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