Dictionary.com
Thesaurus.com
Showing results for ac. Search instead for r-a-.
Jump To:
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  
[ey-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. 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 2 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

ac 3 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

a.c. 4 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

a/c 5 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 6 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

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

Figure 10.5 Centripetal acceleration ac occurs as the direction of velocity changes; it is perpendicular to the circular motion.

From Textbooks Aug. 12, 2015

Ngawang Doka replied in clear, sparkling English that carried a hint of a Canadian ac cent.

From "Into Thin Air" by Jon Krakauer

An agent from Homeland Security Investigations determined that both men are in the U.S. illegally and that Balcarcel Ac has had two previous deportations, the affidavit states.

From Seattle Times Jul. 8, 2022

Both men are being held in local jails, Balcarcel Ac in Charlottesville and Alvarado-Dubon in Richmond.

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

The disasters suffered by his troops obliged him to retrace his steps without having advanced further than Ac Boulak, the last outpost erected by the Russians in 1839, at 180 kilometres from the Emba.

From Travels in the Steppes of the Caspian Sea, the Crimea, the Caucasus, &c. by Xavier Hommaire de Hell

The AC in my car was on the fritz and I arrived red faced and sweaty.

From Los Angeles Times Aug. 11, 2026

Against AC Milan on Saturday, Chelsea's standout performer of pre-season, Joao Pedro, scored twice in a 3-0 win to take his tally to six goals in as many games, including behind-closed-doors fixtures.

From BBC Aug. 9, 2026

Americans need their AC this cold to sleep.

From MarketWatch Aug. 5, 2026

AC Milan and Kaka's heads were turned by City's staggering £108m offer, which would have been more than double the world record transfer at the time.

From BBC Aug. 2, 2026

“There’s no AC in your dad’s car,” said Mr. Patterson.

From "The Line Tender" by Kate Allen

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

I mean cool both figuratively and literally since the A/C is always blasting.

From Los Angeles Times Apr. 13, 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

She is all that is artistic without being vulgar and is the one ac- tress today who can wink without being suggestive.

From Time Magazine Archive

NOTE.—The forms ac-, af-, etc., are euphonic variations of ad-, and follow generally the rule that the final consonant of the prefix assimilates to the initial letter of the root.

From New Word-Analysis by William Swinton

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

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

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

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

These writings are said to date from about 97 to 150 a.c.

From Frauds and Follies of the Fathers A Review of the Worth of their Testimony to the Four Gospels by Joseph Mazzini Wheeler

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

From The Wall Street Journal Feb. 27, 2026

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

The previous six editions of the Champions League, for example, had been won by Manchester United, Real Madrid, Bayern Munich and A.C.

From New York Times Mar. 15, 2024

It explains how the group, formally known as the International Society for Krishna Consciousness, was founded by A.C.

From Los Angeles Times Dec. 27, 2023

These two divisions then formed the 3rd A.C.

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

Not a single prison should get a/c before all the schools in our nation have a/c.

From New York Times Aug. 20, 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

Vocabulary.com logo
by dictionary.com

Dictionary.com's Learning Companion

Go beyond just looking up words.
Remember them forever with VocabTrainer.

Start training