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chlorogenic acid

[klawr-uh-jen-ik, klohr-, klawr-, klohr-] /ˈklɔr əˈdʒɛn ɪk, ˈkloʊr-, ˌklɔr-, ˌkloʊr-/
noun, Biochemistry
a colorless crystalline acid, C 16 H 18 O 9 , that is important in plant metabolism and is purportedly responsible for the browning or blackening of cut apples, potatoes, and other fruits and vegetables.
Origin of chlorogenic acid
1885-90; chloro-1 + -genic; so named because in an ammonia solution it turns green when exposed to air Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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