Pronunciation: (sē),[key] —n., —pl.C's or Cs, c's or cs. 1. the third letter of the English alphabet, a consonant.
2. any spoken sound represented by the letter C or c, as in cat, race, or circle. 3. something having the shape of a C. 4. a written or printed representation of the letter C or c. 5. a device, as a printer's type, for reproducing the letter C or c.
5. county (used with a number to designate a county road): C55.
—Symbol. 1. the third in order or in a series.
2. (sometimes l.c.) (in some grading systems) a grade or mark, as in school or college, indicating the quality of a student's work as fair or average.
3. Music. a. the first tone, or keynote, in the scale of C major or the third tone in the relative minor scale, A minor.
b. a string, key, or pipe tuned to this tone.
c. a written or printed note representing this tone.
d. (in the fixed system of solmization) the first tone of the scale of C major, called do. e. the tonality having C as the tonic note.
f. a symbol indicating quadruple time and appearing after the clef sign on a musical staff.
4. (sometimes l.c.) the Roman numeral for 100.
7. Elect. a. capacitance.
b. a battery size for 1.5 volt dry cells: diameter, 1 in. (2.5 cm); length, 1.9 in. (4.8 cm).
9. Physics. a. charge conjugation.
b. charm1 (def. 9).
10. Biochem. a. cysteine.
11. Also,C-note.Slang.a hundred-dollar bill.
12. a proportional shoe width size, narrower than D and wider than B.
13. a proportional brassiere cup size, smaller than D and larger than B.
14. the lowest quality rating for a corporate or municipal bond.
15. Computers.a high-level programming language often used in conjunction with UNIX and offering a degree of low-level machine control.