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1. The 3rd letter of the Roman alphabet
   - C
    
2. 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
   - speed of light, light speed

1. Being ten more than ninety
   - hundred, one hundred, 100

1. Temperature measurement on the Celsius scale (where water freezes at zero degrees and boils at 100 degrees; unit divisions are equal to the kelvin, with zero kelvin being -273.15 C)
   - degree centigrade, degree Celsius, centigrade, Celsius
    
2. A base found in DNA and RNA and derived from pyrimidine; pairs with guanine
   - cytosine
    
3. (music) the keynote of the scale of C major
    
4. A general-purpose programing language closely associated with the UNIX operating system
    
5. A vitamin found in fresh fruits (especially citrus fruits) and vegetables; prevents scurvy
   - vitamin C, ascorbic acid
    
6. [slang] A street name for cocaine
   - coke [slang], blow [slang], nose candy [slang], snow [slang]
    
7. One of the four nucleotides used in building DNA, also known as also known as deoxycytidylate, or dCMP; all four nucleotides have a common phosphate group and a sugar (ribose)
   - deoxycytidine monophosphate
    
8. A unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second
   - coulomb, ampere-second
    
9. Ten 10s
   - hundred, 100, century, one C
    
10. An abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds
    - carbon, atomic number 6

Derived forms: Cs, cs

See also: cardinal

Type of: alphabetic character, antioxidant, base, charge unit, cocain, cocaine, constant, degree, keynote, large integer, letter, letter of the alphabet, nonmetal, nucleotide, programing language [US], programming language, pyrimidine, quantity unit, speed, tonic, velocity, water-soluble vitamin

Part of: abcoulomb, ampere-minute, black gold [informal], Cebion, coal, crude, crude oil, deoxyribonucleic acid, desoxyribonucleic acid, DNA, fossil oil, Latin alphabet, limestone, oil, petroleum, ribonucleic acid, RNA, rock oil, Roman alphabet

Encyclopedia: C, M, Wade