Main Entry: ab·scis·ic acid

Pronunciation: \ˌab-ˈsi-zik-, -sik-\

Function: noun

Etymology: abscision (variant of abscission) + -ic

Date: 1968

: 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