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• ac
  ac

  abbreviation

  acre; acres.
• Ac
  Ac

  abbreviation

  acetate.
• AC
  AC

  abbreviation

  alternating current.
• A/C
  A/C

  abbreviation

  air conditioning.
• ac-
  ac-

  variant of ad- before c and qu: accede; acquire.
• -ac
  -ac

  variant of -ic after Greek noun stems ending in i: cardiac; maniac.
• a.c.
  a.c.

  abbreviation

  (in prescriptions) before meals.
• A.C.
  A.C.

  abbreviation

  before Christ.
• a/c
  a/c

  abbreviation

  account

ac

¹ American  

abbreviation

1. acre; acres.

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Ac ² American  

abbreviation

Chemistry.

1. acetate.

2. acetyl.

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Ac ³ American  

Symbol, Chemistry.

1. actinium.

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AC ⁴ American  

abbreviation

Electricity.

1. alternating current.

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A/C ⁵ American  

[ey-see] / ˈeɪˈsi /

Also AC, or a/c

abbreviation

1. air conditioning.

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A/C ⁶ American  

Or a/c

abbreviation

Bookkeeping.

1. account.

2. account current.

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ac- ⁷ American  

1. variant of ad- before c and qu: accede; acquire.

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-ac ⁸ American  

1. variant of -ic after Greek noun stems ending in i: cardiac; maniac.

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a.c. ⁹ American  

abbreviation

1. (in prescriptions) before meals.

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A.C. ¹⁰ American  

abbreviation

1. before Christ.

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A.C. ¹¹ American  

abbreviation

1. Army Corps.

2. Athletic Club.

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A/C ¹ British  

abbreviation

1. Air Commodore

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a.c. ² British  

abbreviation

1. (in prescriptions) ante cibum

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AC ³ British  

abbreviation

1. alternating current Compare DC

2. ante Christum

3. Air Corps

4. athletic club

5. Companion of the Order of Australia

6. appellation d'origine contrôlée: the highest French wine classification; indicates that the wine meets strict requirements concerning area of production, strength, etc See VDQS vin de pays vin de table

7. Aelodau'r Cynulliad: Member of the Assembly (that is, the National Assembly of Wales)

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ac ⁴ British  

abbreviation

1. Ascension Island

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a/c ⁵ British  

abbreviation

1. account

2. account current

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Ac ⁶ British  

symbol

1. actinium

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AC Scientific  

1. Abbreviation of alternating current

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Etymology

Origin of -ac⁸

From Latin -acus, from Greek -akos

Origin of a.c.⁹

From Latin ante cibum

Origin of A.C.¹⁰

From Latin ante Christum

Example Sentences

Another player who could see action is Santi Giménez, the AC Milan forward, who has been recovering from an injury and played only 10 minutes against South Korea.

From Los Angeles Times • Jun. 24, 2026

Speaking after the co-hosts made a dominant start, AC Milan midfielder Christian Pulisic said what everyone else was thinking - that the US were "really lucky" to have Balogun.

From BBC • Jun. 19, 2026

Beckham retired in 2013 after two decades with some of the world's most famous football outfits, including Real Madrid, AC Milan and Paris Saint-Germain.

From Barron's • Jun. 12, 2026

Pulisic at his finest is definitely not bang-average, and he had a brilliant year for AC Milan in Italy — but it was last year, and in 2026 he virtually disappeared.

From Salon • Jun. 11, 2026

“Your dad’s gonna need AC if he’s gonna ride all the way with that boot,” said Mr. Patterson.

From "The Line Tender" by Kate Allen

Related Words

• magnetic