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Definition of: carbon cycle

1. Physics A 6-stage thermonuclear process taking place in the interior of stars, by which hydrogen is transformed into helium through the catalytic action of carbon and nitrogen. Compare PROTON-PROTON REACTION.
2. Biol. The biological elaboration and destruction in the biosphere of carbon compounds derived from atmospheric carbon dioxide by photosynthesis.

Phrases starting with the letter: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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