| 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. |
| Main Entry: | serial comma |
| Part of Speech: | n |
| Definition: | a comma preceding the final conjunction in a list of three or more items; also called Harvard comma, Oxford comma |