Main Page | See live article | Alphabetical index AC may stand for: In electricity, AC is the abbrevation of alternating current. AC is an automobile brand, see AC Cars AC can refer to an Anonymous Coward on Slashdot. AC can also means ante christum, that is to say before Christ AC refers to a chemotherapy regime comprising adriamycin and cyclophosphamide Ac is the chemical symbol for actinium This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.