də̇ˈsishən noun
( -s )
Etymology: Late Latin discission-, discissio act of cutting apart, from Latin discissus (past participle of discindere to cut apart, from di- — from dis- apart — + scindere to cut, split) + -ion-, -io -ion — more at dis- , shed
: an incision of the capsule of the lens of the eye (as in treating cataract)