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late 15c., from Middle French excision (14c.) and directly from Latin excisionem (nominative excisio), noun of action from past participle stem of excidere (see excise (v.)).
excision ex·ci·sion (ĭk-sĭzh'ən)n.
Surgical removal by cutting, as of a tumor or a portion of a structure or organ. Also called exsection.
A recombination event in which a genetic element is removed.