AC
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Template:Wiktionary AC may have any of the following meanings:
- From history:
- ante Christum, Latin for "before Christ"; see Anno Domini
- From science, technology or computing:
- in electricity, the abbreviation of alternating current
- in mathematics, specifically set theory, for the axiom of choice
- an automobile brand called AC Cars
- the chemical symbol for actinium, Ac (not AC unless misprinted)
- historically, as a symbol (Ac or AC) for the acetate ion in chemical formulas
- Air conditioning
- in medicine, a chemotherapy regime comprising adriamycin and cyclophosphamide; see AC chemotherapy
- an Anonymous Coward on Slashdot
- in computer security, an authorization certificate or attribute certificate is a digital permission to use a service or a resource.
- .ac, the Internet country code top-level domain (ccTLD) for Ascension Island, as well as a second-level domain used to denote academic institutions in many countries.
- From literature, entertainment or fantasy:
- adult contemporary music
- Alt Cataclius, "After Cataclysm" on the Dragonlance Timeline.
- in Dungeons and Dragons, the abbreviation of Armor Class.
- Asheron's Call, a fantasy MMORPG
- the grindcore band Anal Cunt.
- in Isaac Asimov's The Last Question, AC is the ultimate computer at the end of time.
- in The Armoured Core series, ACs are the robotic fighters you control.
- Anthrocon, a furry fandom convention.
- From politics, society or religion:
- the postnominal letters for the Companion in the Order of Australia
- in British politics, Aelod Cynulliad is the Welsh language equivalent of Assembly Member or AM, denoting a member of the National Assembly for Wales.
- Associación Civil, a title for non profit organizations in Spain
- in Christianity, the antichrist