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Ammonia

/əˈmoʊniə/noun

A pungent gas of nitrogen and hydrogen, dissolved in water for cleaning and made by the tonne for fertiliser.

The Greek roots

ἀμμωνιακόν
ammōniakón
salt of Ammon

Literally: belonging to Ammon

The story of the word

Torbern Bergman named the substance in 1782 after sal ammoniac, the salt long gathered near the temple of Zeus Ammon at Siwa in the Libyan desert. Ἄμμων is the Greek spelling of the Egyptian god Amun, so the bottle under the sink is named for a god of Thebes by way of a Greek transcription. The ammonite fossil shares the name for a different reason, its coil resembling the ram's horns that Ammon wore.

How it travelled
Ancient Egyptian → Ancient Greek → Latin → scientific coinage → English
First recorded
18th century

Same family

ammoniteammoniumammoniacal

In a sentence

The smell of ammonia hit us before the cellar door was fully open.

Half the world's food supply now depends on ammonia made from air.

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