scission

[sizh-uh n, sish-] /ˈsɪʒ ən, ˈsɪʃ-/
noun
1.
a cutting, dividing, or splitting; division; separation.
2.
Chemistry, cleavage (def 7).
Origin
1400-50; late Middle English (< Middle French) < Late Latin scissiōn- (stem of scissiō) a cutting, equivalent to sciss(us) (past participle of scindere to cut) + -iōn- -ion
British Dictionary definitions for scission

scission

/ˈsɪʃən/
noun
1.
the act or an instance of cutting, splitting, or dividing
Word Origin
C15: from Late Latin scissiō, from scindere to split
Word Origin and History for scission
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.)).

scission in Medicine

scission scis·sion (sĭzh'ən, sĭsh'-)
n.

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

  2. See cleavage.