AC

1.
Real Estate. air conditioning.
2.
Electricity. alternating current.

Ac

Chemistry
1.
acetate.
2.
acetyl.

Ac

Symbol, Chemistry
1.
actinium.

ac

1.
Electricity. alternating current.

ac-

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

-ac

1.
variant of -ic after Greek noun stems ending in i: cardiac; maniac.
Origin
< Latin -acus < Greek -akos

A/C

1.
Bookkeeping.
  1. account.
  2. account current.
2.
Real Estate. air conditioning.
Also, a/c.

A.C.1

1.
before Christ.
Origin
< Latin ante Christum

A.C.2

1.
Real Estate. air conditioning.
2.
Electricity. alternating current.
3.
Army Corps.
4.
Athletic Club.

a.c.1

1.
(in prescriptions) before meals.
Origin
< Latin ante cibum

a.c.2

1.
Real Estate. air conditioning.
2.
Electricity. alternating current.
British Dictionary definitions for AC

ac

abbreviation
1.
Ascension Island

Ac

Chemical symbol
1.
actinium

AC

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)
Word Origin
(for sense 2) Latin: before Christ

a/c

abbreviation
1.
account
2.
account current

A/C

abbreviation
1.
(in Canada) Air Commodore

a.c.

abbreviation
1.
(in prescriptions) ante cibum
Word Origin
Latin: before meals
Word Origin and History for AC

abbreviation of air conditioning, by 1966.

AC in Medicine

ac abbr.
Latin ante cibum (before a meal)

Ac 1

The symbol for the element actinium.

ac- pref.
Variant of ad-.

AC in Science
Ac  
The symbol for actinium.
AC  
Abbreviation of alternating current
actinium
  (āk-tĭn'ē-əm)   
Symbol 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.
Related Abbreviations for AC

Ac

  1. actinium
  2. Acts of the Apostles

AC

  1. adult contemporary
  2. air conditioning
  3. alternating current

a.c.

Latin ante cibum (before meals)

A.C.

  1. Latin anno Christi (the year of Christ)
  2. appellate court
  3. Army Corps
  4. Athletic Club

a/c

  1. account
  2. account current
  3. air conditioning

A/C

aircraft
Encyclopedia Article for AC

Ac

(Ac), radioactive chemical element, in Group IIIb of the periodic table, atomic number 89. Actinium was discovered (1899) by Andre-Louis Debierne in pitchblende residues left after Pierre and Marie Curie had extracted radium and was also discovered (1902) independently by Friedrich Otto Giesel. A ton of pitchblende ore contains about 0.15 mg of actinium. The rare, silvery-white metal is highly radioactive, glowing blue in the dark

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