scission

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The act of cutting or severing; division or fission.

[Middle English, from Old French, from Late Latin scissiō, scissiōn-, from Latin scissus, past participle of scindere, to cut, split.]

1. A separation, division, or splitting, as in fission.
2. See cleavage (sense ).

The noun has one meaning:

Meaning #1: the act of dividing by cutting or splitting