ac

Electricity. alternating current.

Nearby words

abyssinian well, abyssopelagic, abyssopelagic zone, abzug, abélard, ac, ac and u, ac-, ac/dc, aca, acaa

Definition for ac (2 of 11)

Ac

Chemistry.

acetate.

acetyl.

Definition for ac (3 of 11)

Ac

Symbol, Chemistry.

actinium.

Definition for ac (4 of 11)

AC

Real Estate. air conditioning.

Electricity. alternating current.

Definition for ac (5 of 11)

ac-

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

Definition for ac (6 of 11)

-ac

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

Origin of -ac

< Latin -acus < Greek -akos

Definition for ac (7 of 11)

a.c.

(in prescriptions) before meals.

Origin of a.c.

From the Latin word ante cibum

Definition for ac (8 of 11)

a.c.

Real Estate. air conditioning.

Electricity. alternating current.

Definition for ac (9 of 11)

A.C.

before Christ.

Origin of A.C.

From the Latin word ante Christum

Definition for ac (10 of 11)

A.C.

Real Estate. air conditioning.

Electricity. alternating current.

Army Corps.

Athletic Club.

Definition for ac (11 of 11)

A/C

or a/c

Bookkeeping.

account.
account current.

Real Estate. air conditioning.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for ac

The conference room suddenly felt very warm, and I wondered if the AC had gone out.
I Shot Bin Laden|Elliot Ackerman|November 16, 2014|DAILY BEAST
Ghanaian soccer player Michael Essien, who plays for AC Milan, has been the subject of what borders on fear mongering.
Europe’s Hidden Ebola Cases|Barbie Latza Nadeau|October 15, 2014|DAILY BEAST
I said to the guy, “Why do they have to turn on the AC so high.”
Jamaica, We Have a Dogsled Team|Allen St. John|March 25, 2014|DAILY BEAST
Much debate centered on the necessary current and the current type (AC versus DC) to assure a rapid and painless death.
The Death Penalty’s Gruesome Truth|Kent Sepkowitz|February 6, 2014|DAILY BEAST

Americans bought 1.5 billion cans of tuna last year, according to AC Nielsen data.
Honey, They Shrunk the Tuna!|William Sherman|July 29, 2010|DAILY BEAST
Saulus se arleasa beswng a cristenan, ac fter re gecyrrednysse ws se arfsta Paulus for Cristes naman oft beswungen.
The Homilies of the Anglo-Saxon Church|lfric
Ac he sette gecmp geleaffullum sawlum, t hi gelyfon to geagenne a ecan welan, a e for his naman a hwilwendan speda forhgia.
The Homilies of the Anglo-Saxon Church|lfric
Ne ferde heo wrigende geond land, ac ws wunigende geyldelice binnan Godes temple.
The Homilies of the Anglo-Saxon Church|lfric
Ne sceal nan man mid galdre wyrte besingan, ac mid Godes wordum h gebletsian, and swa icgan.
The Homilies of the Anglo-Saxon Church|lfric
Hinc illae natae sunt Ducum, Comitum, ac reliquorum id genus ad ostentationem confictae appellationes.
An Outline of the Relations between England and Scotland (500-1707)|Robert S. Rait

British Dictionary definitions for ac (1 of 6)

ac

the internet domain name for

Ascension Island

British Dictionary definitions for ac (2 of 6)

Ac

the chemical symbol for

actinium

British Dictionary definitions for ac (3 of 6)

AC

abbreviation for

alternating currentCompare DC

ante Christum

Air Corps

athletic club

Companion of the Order of Australia

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

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

Word Origin for AC

(for sense 2) Latin: before Christ

British Dictionary definitions for ac (4 of 6)

a/c

/ accounting /

abbreviation for

account

account current

British Dictionary definitions for ac (5 of 6)

A/C

abbreviation for

(in Canada) Air Commodore

British Dictionary definitions for ac (6 of 6)

a.c.

/ obsolete /

abbreviation for

(in prescriptions) ante cibum

Word Origin for a.c.

Latin: before meals

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

Medicine definitions for ac (1 of 3)

ac

abbr.

ante cibum (before a meal)

Medicine definitions for ac (2 of 3)

Ac

The symbol for the elementactinium

Medicine definitions for ac (3 of 3)

ac-

pref.

Variant ofad-

Science definitions for ac (1 of 3)

Ac

The symbol for actinium.

Science definitions for ac (2 of 3)

AC

Abbreviation of alternating current

Science definitions for ac (3 of 3)

actinium

[ ăk-tĭn′ē-əm ]

Ac

A silvery-white, highly radioactive metallic element of the actinide series that is found in uranium ores. It is about 150 times more radioactive than radium and is used as a source of alpha rays and neutrons. Its most stable isotope has a half-life of about 22 years. Atomic number 89; melting point 1,050°C (1,922°F); boiling point (estimated) 3,200°C (5,792°F); specific gravity (calculated) 10.07; valence 3. See Periodic Table.