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[ab-sizh-uh n, -sish-] /æbˈsɪʒ ən, -ˈsɪʃ-/
the act of cutting off; sudden termination.
Botany. the normal separation of flowers, fruit, and leaves from plants.
Origin of abscission
First recorded in 1605-15, abscission is from the Latin word abscissiōn- (stem of abscissiō). See abscissa, -ion Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for abscission


/æbˈsɪʒən; -ˈsɪʃ-/
the separation of leaves, branches, flowers, and bark from plants by the formation of an abscission layer
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
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for abscission

"removal or cutting away," early 15c., from Latin abscissionem (nominative abscissio) "a cutting off," noun of action from past participle stem of abscindere (see abscissa).

Online Etymology Dictionary, © 2010 Douglas Harper
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abscission in Medicine

abscission ab·scis·sion (āb-sĭzh'ən)
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
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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