noun
- A radioactive element of the actinide series; found in uranium ores.
- synonyms: actinium, atomic number 89
- An electric current that reverses direction sinusoidally.
- usage: "In the US most household current is AC at 60 cycles per second"
- synonyms: alternating current, alternating electric current
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). ac. Retrieved September 20, 2026, from http://smartdefine.org/ac/definitions/1254390 |
| Chicago | WordNet. 2010. "ac" http://smartdefine.org/ac/definitions/1254390 (accessed September 20, 2026). |
| Harvard | WordNet 2010, ac, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/ac/definitions/1254390>. |
| MLA | WordNet. "ac" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/ac/definitions/1254390> |