abscission layer

noun Botany.
the layer of specialized, cutinized parenchyma cells that develops in the abscission zone, the disintegration of which causes abscission.
Also called separation layer.


Origin:
1915–20

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World English Dictionary
abscission layer
 
n
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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Example sentences
Northern white cedar will form an abscission layer at the base of small twigs, and will shed entire twigs.
Unlike cantaloupes, honeydews do not form an abscission layer between the melon and the stem that permits easy separation from.
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