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Definition of guanine noun from the Oxford Advanced Learner's Dictionary

guanine

noun
 
/ˈɡwɑːniːn/
 
/ˈɡwɑːniːn/
[uncountable] (chemistry)
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  1. one of the four compounds that make up DNA and RNA
    Word Originmid 19th cent.: from guano + -ine.
Check pronunciation: guanine

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