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in Latin, the form of com- in compounds with stems beginning in vowels and h- and gn- (see com-). Taken in English from 17c. as a living prefix meaning "together, mutually, in common," and used promiscuously with native words and Latin-derived words not beginning with vowels, sometimes even with words already having it (e.g. co-conspiritor).
addressing abbreviation for care of; "common" by 1889.
The symbol for the element cobalt.
Together; joint; jointly; mutually: coaptation.
Subordinate or auxiliary: coenzyme.
To the same extent or degree: codominant.
The symbol for cobalt.
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 country code for Colombia.