c

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

• noun The third letter of the modern English alphabet.
• noun Any of the speech sounds represented by the letter c.
• noun The third in a series.
• noun Something shaped like the letter C.
• noun The third best or third highest in quality or rank.
• noun The first tone in the scale of C major or the third tone in the relative minor scale.
• noun A key or scale in which the tone of C is the tonic.
• noun A written or printed note representing this tone.
• noun A string, key, or pipe tuned to the pitch of this tone.
• abbreviation Physics candle
• abbreviation carat
• abbreviation charm quark
• abbreviation circumference
• abbreviation Mathematics constant
• abbreviation cubic

from The Century Dictionary.

• noun An abbreviation of Companion of the Bath. See bath.
• noun An abbreviation of County Commissioner and of County Court.
• noun An abbreviation of Civil Engineer.
• noun An abbreviation of chief accountant, of controller of accounts, and in Great Britain of chartered accountant.
• noun An abbreviation
• noun of commissary-general, and
• noun of consul-general.
• noun An abbreviation
• noun of court-house, very common in the southern United States, and as far north as southern Pennsylvania, as a part of town-names: as, Spottsylvania C. H.; and
• noun of custom-house.
• An abbreviation of chief justice.
• noun An abbreviation of the Latin (New Latin) Chirurgiæ Magister, Master in Surgery.
• noun An abbreviation of care of, common in addressing letters, etc. Often written c/o
• The third letter and second consonant in the English, as in general in the other alphabets derived from the Phenician.
• As a numeral, in the Roman system, C stands for 100, and is repeated up to CCCC, 400 (followed by D, 500).
• As a symbol:
• As an abbreviation, c. or C. stands, in dental formulas of zoölogy (c.), for canine tooth; in United States money (c.), for cent; in thermometer-readings (c.), for centigrade; in French money (c.), for centime; in references (c.), for chapter (or Latin capitulum); in dates, before the number (c.), for Latin circa, about: in meteorology (c.), for cirrus; in a ship's log-book (c.), for cloudy; and in measures of volume (c.), for cubic.
• noun An abbreviation of Common Pleas and of Court of Probate.
• noun An abbreviation of Court of Session;
• noun Clerk of the Signet;
• noun Custos Sigilli, Keeper of the Seal;
• noun con sordini (which see).
• An abbreviation of Court and [lowercase] of centimeter.
• An abbreviation of Court of Appeal;
• of Court of Arches;
• of Chancery Appeals;
• of commercial agent;
• of Confederate army;
• of county alderman.
• An abbreviation of the French compte courante (account current);
• of cubic centimeter.
• An abbreviation of Cape Breton;
• of Chief Baron (of the Exchequer) (see baron, 2);