carbon
[ˈkɑːb&+{ə}n]
n
a nonmetallic element existing in the three crystalline forms: graphite, diamond, and buckminsterfullerene: occurring in carbon dioxide, coal, oil, and all organic compounds. The isotope carbon-12 has been adopted as the standard for atomic wt; carbon-14, a radioisotope with a half-life of 5700 years, is used in radiocarbon dating and as a tracer. Symbol: C; atomic no: 6; atomic wt: 12.011; valency: 2, 3, or 4; relative density: 1.8--2.1 (amorphous), 1.9--2.3 (graphite), 3.15--3.53 (diamond); sublimes at 3367±25°C; boiling pt: 4827°C.(as modifier)
short for carbon papershort for carbon copy
a carbon electrode used in a carbon-arc light or in carbon-arc welding
a rod or plate, made of carbon, used in some types of battery
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