Etymology
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excision (n.)

"the act of full or partial cutting off or away by surgical operation," especially of a small, diseased part of the body, late 15c. (Caxton), from Old French excision (14c.) and directly from Latin excisionem (nominative excisio) "a destroying," noun of action from past-participle stem of excidere "to cut out; destroy," from ex "out" (see ex-) + -cidere, combining form of caedere "to cut down" (from PIE root *kae-id- "to strike").

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Definitions of excision

excision (n.)
the omission that is made when an editorial change shortens a written passage;
both parties agreed on the excision of the proposed clause
Synonyms: deletion / cut
excision (n.)
surgical removal of a body part or tissue;
Synonyms: ablation / extirpation / cutting out
excision (n.)
the act of banishing a member of a church from the communion of believers and the privileges of the church; cutting a person off from a religious society;
Synonyms: excommunication
excision (n.)
the act of pulling up or out; uprooting; cutting off from existence;
Synonyms: extirpation / deracination
From wordnet.princeton.edu