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abscission layer

noun Botany.
  1. the layer of specialized, cutinized parenchyma cells that develops in the abscission zone, the disintegration of which causes abscission.
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Origin of abscission layer

First recorded in 1915–20
Also called separation layer.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for abscission layer

abscission layer

noun
  1. a layer of parenchyma cells that is formed at the bases of fruits, flowers, and leaves before abscission. As the parenchyma disintegrates, the organ becomes separated from the plant
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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