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abscission

[ab-sizh-uh n, -sish-] /æbˈsɪʒ ən, -ˈsɪʃ-/
noun
1.
the act of cutting off; sudden termination.
2.
Botany. the normal separation of flowers, fruit, and leaves from plants.
Origin
1605-1615
1605-15; < Latin abscissiōn- (stem of abscissiō). See abscissa, -ion
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples for abscission
  • Thus, following shoot abscission there are two buds adjacent to the aerial shoot scar.
  • Low levels of ethylene can result in leaf abscission, epinasty and yellowing.
British Dictionary definitions for abscission

abscission

/æbˈsɪʒən; -ˈsɪʃ-/
noun
1.
the separation of leaves, branches, flowers, and bark from plants by the formation of an abscission layer
2.
the act of cutting off
Word Origin
C17: from Latin abscissiōn-, from ab-1 + scissiō a cleaving
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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abscission in Medicine

abscission ab·scis·sion (āb-sĭzh'ən)
n.
The act of cutting off or away.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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abscission in Science
abscission
  (āb-sĭzh'ən)   
The separation of a leaf, flower, or fruit from a plant as a result of natural structural and chemical changes. ◇ The abscission zone is a layer of weak, thin-walled cells that form across the base of the plant part where the break eventually occurs. A corky layer containing suberin forms beneath the abscission zone to protect the plant.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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