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From ethyl + sulphuric acid.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: The partial ethyl ester of sulfuric acid, H.C₂H₅.SO₄, produced as a thick liquid by the action of sulphuric acid on alcohol Full definition →
From ethyl + sulphuric acid.
Etymology from Wiktionary, CC BY-SA 4.0.