A unit of liquid measurement equal to one quarter of a pint; also a proper name.
From Old French 'gille,' a unit of measure. Possibly from Latin 'gillo.' As a measurement, it was standardized in medieval times for ale and other liquids.
The 'gill' measurement is why we still talk about 'pints' of beer—medieval merchants needed consistent measurements, so they created fractional units that persisted for 800+ years through all economic changes.
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