Informal plural of bicarb, short for bicarbonate, especially referring to baking soda.
Shortening of bicarbonate, with -s for plural form. Emerged as colloquial British English in the 20th century, particularly in cooking and household contexts.
British bakers and cooks saved so many syllables with this abbreviation that it became the standard word in British English, while Americans stuck with the longer 'baking soda'!
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