(dated, organic chemistry) phenol (C₆H₅OH)

A weak unstable acid, H₂CO₃, known only in solution, and as carbonate salts; it is present in carbonated drinks, and sparkling wine, but decomposes to form carbon dioxide and water.

(geology) Of a geologic period within the Paleozoic era; comprises the lower, middle and upper Mississippian and lower, middle and upper Pennsylvanian epochs from about 345 to 280 million years ago, when coal was laid down.

(geology) the Carboniferous period

A tax levied on the carbon contents used by the burning fossil fuels, so as to discourage the production of the greenhouse gas carbon dioxide.

Containing or producing carbon.

(inorganic chemistry) A colourless or white inorganic compound, CaCO₃, occurring as chalk, limestone, marble etc; reacts with acids to liberate carbon dioxide.

(archaic) A deep-red or fiery colored garnet or other dark red precious stone, especially when cut cabochon.

a process whereby trees and other plants remove carbon dioxide from the atmosphere and through photosynthesis, turn it into plant material

Of or relating to carbon.