C

from The American Heritage® Dictionary of the English Language, 5th Edition.

• abbreviation cell phone number
• abbreviation Celsius
• abbreviation Sports center
• abbreviation centigrade
• abbreviation Physics charm
• abbreviation cold
• abbreviation consonant
• abbreviation coulomb
• abbreviation cytosine
• The symbol for the Roman numeral one hundred.
• The symbol for the speed of light in a vacuum.
• noun A widely used programming language.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun The third letter of the basic modern Latin alphabet.
• noun mathematics cardinal number one hundred (100).
• noun The third letter of the English alphabet, called cee and written in the Latin script.
• noun The ordinal number third, derived from this letter of the English alphabet, called cee and written in the Latin script.
• noun chemistry Carbon.
• noun metrology Symbol for the coulomb, an SI unit of electric charge.
• noun slang Cocaine.
• noun computing The digit for 12.
• noun genetics IUPAC 1-letter abbreviation for any cytosine
• noun biochemistry IUPAC 1-letter abbreviation for cysteine
• noun stock symbol Symbol for the company Citigroup Inc on the NYSE
• noun mathematics differentiable class
• noun mathematics denotes the constant of integration
• noun A standard size of dry cell battery between A and D.
• noun music Guitar chord – C – Played 0 1 0 2 3 0.
• noun slang $100; a c-note.
• noun music The first note in the C chromatic and major scales.
• noun An academic grade better than a D and worse than a B.
• proper noun A particular high-level programming language from which many others are derived.
• proper noun UK Head of the Secret Intelligence Service.