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Synonyms

ac

1 American  

abbreviation

  1. acre; acres.


Ac 2 American  

abbreviation

Chemistry.
  1. acetate.

  2. acetyl.


Ac 3 American  
Symbol, Chemistry.
  1. actinium.


AC 4 American  

abbreviation

Electricity.
  1. alternating current.


A/C 5 American  
[ay-see] / ˈeɪˈsi /
Also AC, or a/c

abbreviation

  1. air conditioning.


A/C 6 American  
Or a/c

abbreviation

Bookkeeping.
  1. account.

  2. account current.


ac- 7 American  
  1. variant of ad- before c and qu: accede; acquire.


-ac 8 American  
  1. variant of -ic after Greek noun stems ending in i: cardiac; maniac.


a.c. 9 American  

abbreviation

  1. (in prescriptions) before meals.


A.C. 10 American  

abbreviation

  1. before Christ.


A.C. 11 American  

abbreviation

  1. Army Corps.

  2. Athletic Club.


a.c. 1 British  

abbreviation

  1. (in prescriptions) ante cibum

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

ac 2 British  

abbreviation

  1. Ascension Island

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Ac 3 British  

symbol

  1. actinium

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

A/C 4 British  

abbreviation

  1. Air Commodore

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

AC 5 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)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

a/c 6 British  

abbreviation

  1. account

  2. account current

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

AC Scientific  
  1. Abbreviation of alternating current


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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Our Welsh language friends can start listening to the big match build-up now by using the Carl ac Alun link above.

From BBC ● Mar. 25, 2024

He was a very well-known, established character ac even before "I Love Lucy."

From Fox News ● Jun. 5, 2021

Comparing not having A/C to 100 years ago when there was no ac is not a fair comparison.

From New York Times ● Aug. 15, 2016

Centripetal acceleration ac is the acceleration experienced while in uniform circular motion.

From Textbooks ● Aug. 12, 2015

It stood just ac ross from the cobhoust, a tumbledown shed full of stuff left there in Grandpa Dowdel’s time.

From "A Long Way from Chicago" by Richard Peck

Balcarcel’s attorney, Samuel Simpson V, said Monday that he would be “very surprised” if Balcarcel Ac and Alvarado-Dubon were planning a mass shooting.

From Seattle Times ● Jul. 11, 2022

Balcarcel Ac was not arrested until July 5.

From Seattle Times ● Jul. 8, 2022

Even to copy a relatively short paper, “Proc Nat Ac Sci”—“Proceedings of the National Academy of Sciences”—could take the better part of an hour.

From The New Yorker ● Jan. 6, 2020

Actinium, Ac, is the first member of the fourth transition series, which also includes Rf through Rg.

From Textbooks ● Feb. 14, 2019

Potts, "Freshwater Sponges as improbable causes of the pollution of river-water," P. Ac.

From Freshwater Sponges, Hydroids & Polyzoa by Nelson Annandale

He was on the bench for the final two games against Leeds and AC Milan, but did not get on.

From BBC ● Oct. 5, 2026

The use of an AC system for the first electric chair—which Edison actively encouraged—hardly hurt the message.

From The Wall Street Journal ● Sep. 23, 2026

His anti-AC publicity campaign worked to convince the public that AC was more deadly than DC.

From The Wall Street Journal ● Sep. 23, 2026

Osorio was on the radar of AC Milan, RB Leipzig, Salzburg and a number of other English and German clubs before he left Santiago for Denmark at the age of 19.

From BBC ● Sep. 23, 2026

But Westinghouse, whose AC system was inherently cheaper and more efficient, bid $399,000.

From "The Devil in the White City" by Erik Larson

To study the process, the researchers developed a mouse model in which they could switch off the lamin A/C gene specifically in adipocytes.

From Science Daily ● Jul. 26, 2026

Appeared in the July 25, 2026, print edition as 'Notable & Quotable: A/C'.

From The Wall Street Journal ● Jul. 24, 2026

Ferrari reveals its new EV, the UN shares an alternative metric to GDP, and Europe won’t embrace A/C despite deadly heatwaves.

From Slate ● May 30, 2026

The first statement shows a payment was sent to a Barclays account where Reinaldo Avila da Silva is named as "A/C", typically an abbreviation for account.

From BBC ● Feb. 2, 2026

Roy waited inside for a while, but without A/C it was unbearably hot and sticky.

From "Hoot" by Carl Hiaasen

Still, with the prices of many commodities climbing, the companies couldn’t ac- commodate price shocks, so they often  wound  up hiring banks to hedge their vulnerability to volatile product markets.

From MSNBC ● Jun. 4, 2014

“I suppose the problem at the moment is that we don’t have a one- to-one mapping, because even our best theories aren’t completely ac- curate,” Ladyman said.

From Scientific American ● Jan. 31, 2014

Very democratic, proud of being a plain American, she likes people, is always ac- cessible to strangers.

From Time Magazine Archive

The government has devised civic ac- tion programs to rebuild damaged hamlets, and anti-guerrilla patrols are often accompanied by doctors who bring free medical care to the hill people.

From Time Magazine Archive

And when the drummers, ac- cepting his drink, raised their glasses and said, “Here’s to you,” Charles was delighted.

From "East of Eden" by John Steinbeck

NOTE.—The suffix -ac is found only in Latin derivatives of Greek origin.

From New Word-Analysis by William Swinton

A new report finds that about 3% of autos--high- and low-end models--have fungi and bacteria breeding in the moisture that collects on the a.c.

From Time Magazine Archive

In the third century a.c. he composed in Greek a history of his native land, which has perished.

From Myths of Babylonia and Assyria by Donald Alexander Mackenzie

The 60 h.p. has parallel a.c. cylinders, the other two are radial w.c.

From Jane's All the World's Aircraft 1913 by Various

Power.—A transformer for stepping down a commercial alternating current for lighting and heating the filament and for stepping up the commercial a.c., for charging the plate of a vacuum tube oscillator.

From The Radio Amateur's Hand Book by A. Frederick (Archie Frederick) Collins

It turned out that all electricity here was d.c., conjured up by commanding the electrons in a wire to move in one direction, and completely useless with a.c. motors.

From The Sky Is Falling by Lester Del Rey

Other historical Pasadena figures in the book include the bookseller A.C.

From The Wall Street Journal ● Feb. 27, 2026

And Hoecht, along with defensive line coach Giff Smith and assistant A.C.

From Los Angeles Times ● Nov. 22, 2024

But the filmmaking team is fairly confident it belongs to Irvine, due to the sock found inside the boot being embroidered with the words "A.C. Irvine".

From BBC ● Oct. 11, 2024

Other students, not so much — they were stuck in older dorms without A.C.

From New York Times ● Jun. 19, 2024

The 7th Division's doings are dealt with because these were inextricably mixed up with the operations of the 1st A.C. east of Ypres.

From The First Seven Divisions Being a Detailed Account of the Fighting from Mons to Ypres by Ernest W. Hamilton

Chris Coucheron-Aamot, a guest at the Sandals resort, wrote on Facebook that the cause of the episode “may have been a fault with the a/c in the unit, causing a toxic coolant leak.”

From Seattle Times ● May 9, 2022

During this meeting, Spencer noted some 30 claims which he attributes to Bashir, including Jephson's alleged plots against her: "Jephson - dangerous: money. Left offshore a/c in March 1994".

From BBC ● May 20, 2021

But then, not all of those 90% of American households with a/c are affluent – not even close.

From The Guardian ● Aug. 11, 2019

I used to have an office job where the a/c malfunctioned & management refused to make a repair.

From New York Times ● Aug. 15, 2016

If you pay £5 into my a/c at Childs, it will be simplest.

From Letters from Mesopotamia in 1915 and January, 1916, from Robert Palmer, who was killed in the Battle of Um El Hannah, June 21, 1916, aged 27 years by Robert Stafford Arthur Palmer

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