C : C is the third letter of the English alphabet. It is from the Latin letter C, which in old Latin represented the sounds of k, and g (in go); its original value being the latter. In Anglo-Saxon words, or Old English before the Norman Conquest, it always has the sound of k. The Latin C was the same letter as the Greek /, /, and came from the Greek alphabet. The Greeks got it from the Ph/nicians. The English name of C is from the Latin name ce, and was derived, probably, through the French. Etymologically C is related to g, h, k, q, s (and other sibilant sounds). Examples of these relations are in L. acutus, E. acute, ague; E. acrid, eager, vinegar; L. cornu, E. horn; E. cat, kitten; E. coy, quiet; L. circare, OF. cerchier, E. search.

C : The keynote of the normal or "natural" scale, which has neither flats nor sharps in its signature; also, the third note of the relative minor scale of the same.

C : C after the clef is the mark of common time, in which each measure is a semibreve (four fourths or crotchets); for alla breve time it is written /.

C : The "C clef," a modification of the letter C, placed on any line of the staff, shows that line to be middle C.

C : As a numeral, C stands for Latin centum or 100, CC for 200, etc.

Example:
a/C air handler is making a loud now when running. Can below in air handler be malfunCtioning?

Taxonomy
CANTER, horse, Thoroughbred Ex-Racehorses, thoroughbred racehorses, Communication Alliance, thoroughbred, horse adoption, Illinois, 501c3, horse rescue, horse wanted, Ohio State University, racehorse rescue, foster care, California, Michigan, Mid Atlantic, New England.

Defination from the web:
... CANTER stands for The Communication Alliance to Network Thoroughbred Ex-Racehorses. ...