abscission /abˈsiZHən, æbˈsɪʒən 
/ ▸ noun Botany the natural detachment of parts of a plant, typically dead leaves and ripe fruit: leaf abscission in trees
[as modifier] abscission layer.
– ORIGIN early 17th century : from Latin abscissio(n-), from abscindere, from ab- ‘off’ + scindere ‘to cut’.
EnglishOxford New American Dictionary
