sourern.
rare.
One who sours or causes sourness.
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the world > physical sensation > taste and flavour > sourness or acidity > [noun] > sourer
sourer1737
1737 Gentleman's Mag. May 293/1 There is at least a Pair of them; one a Sweetener, the other a Sourer.
This entry has not yet been fully updated (first published 1913; most recently modified version published online June 2021).
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n.1737