excision

中文： 切除、删除、割除

1. The removal of some text during editing. (countable, uncountable)
2. The removal of something (a tumor or body part) by cutting. (countable, uncountable)
3. The removal of a gene from a section of genetic material. (countable, uncountable)
4. The fact that, under certain hypotheses, the homology of a space relative to a subspace is unchanged by the identification of a subspace of the latter to a point. (countable, uncountable)

复数 excisions