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-onic

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a suffix used in forming names of acids, especially carboxylic acids obtained by oxidation of aldoses: gluconic acid.
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Origin of -onic

Perhaps generalized from lactonic acid as translation of German Lactonsäure;see lactose, -one, -ic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022
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