Definition of abscisic acid in English:

abscisic acid

Line breaks: ab|scis¦ic acid
Pronunciation: /abˈsɪsɪk


[mass noun] Biochemistry
  • A plant hormone which 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 abscisin (the earlier name for the hormone), from abscission.

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