Ca

n.

1.

the chemical symbol for calcium, the fifth most abundant element in the earth's crust.

Noun	1.	Ca - a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals Synonyms: atomic number 20, calcium
	2.	CA - a state in the western United States on the Pacific; the 3rd largest state; known for earthquakes Synonyms: Calif., California, Golden State

1.	(theory, architecture)	CA - cellular automaton.
2.	(company)	CA - Computer Associates.
3.	(cryptography)	CA - Certificate Authority.
4.	(networking)	ca - The country code for Canada.

Computer Associates (manufacturer)atomic number 20, burnt lime, calcined lime, calcium, calcium ion, calcium oxide, calx, factor IV, fluor, fluorite, fluorspar, fluxing lime, gypsum, lime, limestone, metal, metallic element, quicklime, unslaked lime