abscission

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ab·scis·sion

(ab-si'shŭn), Avoid the mispronunciation ab-si'zhŭn.
Cutting away.
[L. ab-scindo, pp. -scissus, to cut away from]
Farlex Partner Medical Dictionary © Farlex 2012

abscission

(ăb-sĭzh′ən)
n.
The act of cutting off.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

abscission

An antiquated term for cutting; in modern medicine it has been replaced by the term excision, see there.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

ab·scis·sion

(ab-sish'ŭn)
Cutting away.
[L. ab-scindo, pp. -scissus, to cut away from]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

abscission

The act of cutting off.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005
Abscissionclick for a larger image
Fig. 4 Abscission . Abscission layer in a leafstalk.

abscission

the process by which plant organs are shed. This process occurs in the stalks of unfertilized flowers, in ripe fruits and in the base of the petiole of deciduous leaves in autumn, or in diseased leaves at any time. It is due to the formation of an abscission layer of thin-walled cells in the stalk base which rupture under strain produced by e.g. wind. A layer of cork forms beneath the abscission layer to seal the plant surface. Abscission is controlled by plant hormones present: a low concentration of AUXIN, high amounts of ETHYLENE, and (in some plants) a high concentration of ABSCISIC ACID all stimulate production of the abscission layer.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005

ab·scis·sion

(ab-sĭ'zhŭn)
Cutting away.
[L. ab-scindo, pp. -scissus, to cut away from]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
One 'Monroe' (G-WI) plant wilted in less than 1/3 of its crown about 3 weeks after beetle entry, but after abscising the wilted leaves the plant recovered and did not exhibit any additional external symptoms.
The first is that ethylene production increases prior to abscission in many abscising plant organs.