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Co

Symbol, Chemistry.

co-

variant of com- before a vowel, h, and gn: coadjutor; cohabit; cognate . The prefix co-, now productively forms new words from bases beginning with any sound (co-conspirator; co-manage; coseismic ), sometimes with the derived sense “auxiliary, subsidiary” (coenzyme; copilot ), and, in mathematics and astronomy, with the sense “complement” (codeclination ).

Co.

Also, co.

C/O

1.
cash order.
2.
certificate of origin.

C/o

1.
care of.
2.
Bookkeeping. carried over.

c/o

1.
care of.
2.
Bookkeeping. carried over.
3.
cash order.

C.O.

1.
cash order.
2.
Commanding Officer.
3.
conscientious objector.
4.
correction officer.

c.o.

1.
care of.
2.
carried over.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
co
 
the internet domain name for
1.  a commercial company (used with a country domain name)
2.  Colombia

Co1
 
the chemical symbol for
cobalt

Co2
 
abbreviation for
County

Co or co3
 
abbreviation for
1.  (esp in names of business organizations) Company
2.  informal and co and the rest of them: Harold and co
 
co or co3 (kəʊ)
 
abbreviation for

CO
 
abbreviation for
1.  Commanding Officer
2.  Commonwealth Office
3.  conscientious objector
4.  Colorado
5.  Colombia (international car registration)

co-
 
prefix
1.  together; joint or jointly; mutual or mutually: coproduction
2.  indicating partnership or equality: cofounder; copilot
3.  to the same or a similar degree: coextend
4.  (in mathematics and astronomy) of the complement of an angle: cosecant; codeclination
 
[from Latin, reduced form of com-]

c/o
 
abbreviation for
1.  care of
2.  accounting carried over

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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Etymonline
Word Origin & History

co-
see com-.

c/o
addressing abbreviation for care of, "common" by 1889.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

Co
The symbol for the element cobalt.

co- pref.

  1. Together; joint; jointly; mutually: coaptation.

  2. Subordinate or auxiliary: coenzyme.

  3. To the same extent or degree: codominant.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
Co  
The symbol for cobalt.
cobalt   (kō'bôlt')  Pronunciation Key 
Symbol Co
A silvery-white, hard, brittle metallic element that occurs widely in metal ores. It is used to make magnetic alloys, heat-resistant alloys, and blue pigment for ceramics and glass. Atomic number 27; atomic weight 58.9332; melting point 1,495°C; boiling point 2,900°C; specific gravity 8.9; valence 2, 3. See Periodic Table.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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FOLDOC
Computing Dictionary

co definition

networking
The country code for Colombia.
(1999-01-27)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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American Heritage
Abbreviations & Acronyms
co
Corsican
Co
  1. cobalt

  2. Corinthians

CO
  1. carbon monoxide

  2. cardiac output

  3. cash order

  4. Colorado

  5. Colombia (international vehicle ID)

  6. commanding officer

  7. conscientious objector

  8. cutoff

  9. cut out

co.
  1. company

  2. county

Co.
  1. company

  2. county

c.o.
carried over
C.O.
common orders
c/o
  1. care of

  2. carry over

  3. complains of

C/O
  1. cash order

  2. certificate of origin

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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Example sentences for Co
As the eldest of her family, she inherited the family castle in trim, co.
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