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serial comma


series comma

a comma used after the next-to-last item in a series of three or more items when the next-to-last and last items are separated by a conjunction. In the series A, B, C, or D, the comma after C is the series comma.
Also called serial comma. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Contemporary definitions for serial comma

a comma preceding the final conjunction in a list of three or more items; also called Harvard comma , Oxford comma's 21st Century Lexicon
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