The Collaborative International Dictionary
Circumscissile
Circumscissile \Cir`cum*scis"sile\, a. [Pref. circum- + scissle.] (Bot.) Dehiscing or opening by a transverse fissure extending around (a capsule or pod). See Illust. of Pyxidium.
Wiktionary
circumscissile
a. (context botany English) Describing any seed-vessel that splits along a circumference, with the upper part coming off as a lid