circumsciss,a.Bot.|ˈsɜːkəmsɪs| [ad. L. circumsciss-uspa.pple. of circumscindĕre to cleave or tear around.] Having a transverse circular fissure; opening by circumscissile dehiscence. 1870Hooker Stud. FloraIntrod. 15 Primulaceæ..capsule usually 5–10-valved at the top, or circumsciss.