Definition of abscisic acid in English:

abscisic acid

Syllabification: ab·scis·ic ac·id
Pronunciation: /abˌsisik ˈasid


  • A plant hormone that promotes leaf detachment, induces seed and bud dormancy, and inhibits germination.
    More example sentences
    • Of particular interest here is the amphipathic plant hormone abscisic acid.
    • Subsequently, a signal transduction cascade involving at least four plant hormones, ethylene, auxin, abscisic acid, and gibberellic acid, is activated.
    • When conditions are otherwise in favour of producing the submerged type morphology, an exogenous supply of the plant hormone abscisic acid at an optimal concentration induces aerial type characteristics.


1960s: abscisic from the earlier name for the hormone abscisin, from abscission.

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