abscisic acid

noun ab·scis·ic acid \ˌab-ˈsi-zik-, -sik-\

Definition of abscisic acid

  1. :  a plant hormone C15H20O4 that is a sesquiterpene widespread in nature and that typically promotes leaf abscission and dormancy and has an inhibitory effect on cell elongation

Origin and Etymology of abscisic acid

abscision (variant of abscission) + -ic

First Known Use: 1968

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a rounded knoll or a ridge of ice

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