scission

noun

1. a cutting, dividing, or splitting; division; separation.
2. Chemistry. cleavage(def 7).

noun

1. the act or an instance of cutting, splitting, or dividing

n.“act of cutting or dividing,” mid-15c., from French scission (14c.), from Late Latin scissionem (nominative scissio) “a cleaving, dividing,” noun of action from past participle stem of Latin scindere “to cut” (see shed (v.)). n.

1. A separation, division, or splitting, as in fission.
2. cleavage