IPA: /ɪkˈsɪʒən/
KK: /ɪkˈsɪʒən/
The act of removing something, especially by cutting it out, such as a tumor or a part of text.
The surgeon performed an excision to remove the tumor from the patient's body.
Excision is formed from "ex-" (meaning out of or away from) and "caedere" (meaning to cut). The word describes the act of cutting out or removing something.
Think of 'cutting out' ('ex-') something ('caedere') — that's what excision means.