Nearby Words
AC
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AC
1.
Real Estate. air conditioning.
2.
Electricity. alternating current.
Ac
Symbol, Chemistry.
ac
Electricity. alternating current.
ac-
A.C.
1.
Real Estate. air conditioning.
2.
Electricity. alternating current.
3.
before Christ. Origin:
< Latin ante Christum
< Latin ante Christum
4.
Army Corps.
5.
Athletic Club.
a.c.
1.
Real Estate. air conditioning.
2.
Electricity. alternating current.
3.
(in prescriptions) before meals.
Origin:
< Latin ante cibum
< Latin ante cibum
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
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|
Link To AC
Collins
World English Dictionary
| ac | |
| —the internet domain name for | |
| Ascension Island | |
| Ac | |
| —the chemical symbol for | |
| actinium | |
| AC | |
| —abbreviation for | |
| 1. | Compare DC alternating current |
| 2. | ante Christum |
| 3. | Air Corps |
| 4. | athletic club |
| 5. | Companion of the Order of Australia |
| 6. | VDQS vin de pays See vin de table appellation d'origine contrôlé the highest French wine classification; indicates that the wine meets strict requirements concerning area of production, strength, etc |
| 7. | Aelodau'r Cynulliad: Member of the Assembly (that is, the National Assembly of Wales) |
| [(for sense 2) Latin: before Christ] | |
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Medical Dictionary
ac abbr.
Latin ante cibum (before a meal)
Ac 1
The symbol for the element actinium.
ac- pref.
Variant of ad-.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
| Ac
The symbol for actinium. |
| AC
Abbreviation of alternating current |
actinium  (āk-tĭn'ē-əm) Pronunciation Key
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. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
American Heritage
Abbreviations & Acronyms
Ac
|
AC
|
The American Heritage® Abbreviations Dictionary, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Encyclopedia Britannica
Encyclopedia
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
Learn more about Ac with a free trial on Britannica.com.
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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