25. c the velocity of light in a vacuum: approximately 186,000 miles per second or 299,793 km per second.
26. c the velocity of sound.
Definition of 'c'
Princeton's WordNet
1. (noun)degree centigrade, degree Celsius, C a degree on the centigrade scale of temperature
2. (noun)speed of light, light speed, c the speed at which light travels in a vacuum; the constancy and universality of the speed of light is recognized by defining it to be exactly 299,792,458 meters per second
3. (noun)vitamin C, C, ascorbic acid a vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy
4. (noun)deoxycytidine monophosphate, C one of the four nucleotides used in building DNA; all four nucleotides have a common phosphate group and a sugar (ribose)
5. (noun)cytosine, C a basefound in DNA and RNA and derived from pyrimidine; pairs with guanine
6. (noun)carbon, C, atomic number 6 an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
4. C indicates a cup as a measurement in recipes 2 c flour
Definition of 'c'
Webster Dictionary
1. c c is the thirdletter of the Englishalphabet. It is from the Latinletter C, which in old Latin represented the sounds of k, and g (in go); its originalvaluebeing 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 sameletter as the Greek /, /, and came from the Greekalphabet. The Greeks got it from the Ph/nicians. The Englishname of C is from the Latinname 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