ac
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abbreviation
acre; acres.
QUIZ
THINGAMABOB OR THINGUMMY: CAN YOU DISTINGUISH BETWEEN THE US AND UK TERMS IN THIS QUIZ?
Do you know the difference between everyday US and UK terminology? Test yourself with this quiz on words that differ across the Atlantic.
Question 1 of 7
In the UK, COTTON CANDY is more commonly known as…
Other definitions for ac (2 of 11)
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Other definitions for ac (4 of 11)
Other definitions for ac (5 of 11)
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Origin of -ac
From Latin -acus, from Greek -akos
Other definitions for ac (7 of 11)
a.c.
abbreviation
(in prescriptions) before meals.
Origin of a.c.
From Latin ante cibum
Other definitions for ac (8 of 11)
Also AC, A.C., a.c.
Other definitions for ac (9 of 11)
Other definitions for ac (10 of 11)
A.C.1
abbreviation
before Christ.
Origin of A.C.
1From Latin ante Christum
Other definitions for ac (11 of 11)
A.C.2
abbreviation
Army Corps.
Athletic Club.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use ac in a sentence
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
Word Origin for AC
(for sense 2) Latin: before Christ
British Dictionary definitions for ac (4 of 6)
a.c.
/ obsolete /
abbreviation for
(in prescriptions) ante cibum
Word Origin for a.c.
Latin: before meals
British Dictionary definitions for ac (5 of 6)
a/c
/ accounting /
abbreviation for
account
account current
British Dictionary definitions for ac (6 of 6)
A/C
abbreviation for
(in Canada) 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
Scientific definitions for ac (1 of 2)
Ac
The symbol for actinium.
Scientific definitions for ac (2 of 2)
AC
Abbreviation of alternating current
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.