Etymology
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abscission (n.)

"removal or cutting away," early 15c., from Latin abscissionem (nominative abscissio) "a cutting off, a breaking off, interruption," noun of action from past-participle stem of abscindere "to cut off, divide, part, separate" (see abscissa).

Origin and meaning of abscission
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Definitions of abscission

abscission (n.)
shedding of flowers and leaves and fruit following formation of scar tissue in a plant;
abscission (n.)
the act of cutting something off;
Synonyms: cutting off
From wordnet.princeton.edu