A.C.

A.C.
1. Real Estate. air conditioning.
2. Elect. alternating current.
3. before Christ. [ < L ante Christum]
4. Army Corps.
5. Athletic Club.

* * *

prefix. the form of ad- (Cf.ad-) before c, k, and q, as in accede, acknowledgment, acquaint.
ac.,
acre or acres.
a.c. or a-c,
alternating current (of electricity).
Usage These abbreviations are now widely used as modifiers: »

an a.c. motor.

Ac (no period),
1. actinium (chemical element).
2. alto-cumulus (clouds).
AC (no periods),
1. U.S. Air Corps (before World War II).
2. alternating current.
A/C or a/c (no periods),
Commerce.
1. account.
2. account current.
A.C.,
1. British. aircraftsman.
2. alternating current.
3. before Christ (Latin, ante Christum).

Useful english dictionary. 2012.

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