Definition of abscission in English:


Line breaks: ab¦scis|sion
Pronunciation: /əbˈsɪʃ(ə)n


[mass noun] Botany
  • The natural detachment of parts of a plant, typically dead leaves and ripe fruit: leaf abscission in trees [as modifier]: abscission layer
    More example sentences
    • The presence and balance of plant hormones have been shown to affect abscission of leaves, flowers, and immature and mature fruit.
    • Ethylene is involved in many biological processes, like fruit ripening, flower and leaf abscission, senescence, many stress acclimations, and growth.
    • They produce numerous biological effects including promotion of leaf senescence and abscission, stomatal closure, inhibition of root growth, and germination of non-dormant seeds.



Pronunciation: /əbˈsʌɪz/
More example sentences
  • The seeds and any abscised siliques were collected from plastic collars around the plant.
  • Abscission dynamics was obtained by plotting abscised fruitlets collected from the ground at 1 d intervals and expressed per tree.
  • In the short term, stomata usually open again within a few days when water stress is still imposed. ‘Xeromorphic’ leaves are often the first to be abscised after rewatering and new leaves are formed by bud break.


early 17th century: from Latin abscissio(n-), from abscindere, from ab- 'off' + scindere 'to cut'.

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