Word Roots are a Part of History. "Histories Make Men Wise" -- Bacon.

circumscissile

opening or splitting by a transverse fissure around circumference, leaving an upper and lower half, said of certain seed pods (vessel for seed) or capsules (cases or pods containing seeds; a small soluble gelatin container enclosing a dose of medicine)

[植]周裂的

circumscissile = circum- (around) + sciss (cut; split) + -ile (relating to);
circumscissile = relating to opening or splitting around circumference of seed pods or capsules

Note: You may sometimes find that a vowel such as o is often inserted between two roots, as o inserted between phon and graph in phonograph = phon + o + graph, the reason is for easy pronounciation. Another example is archaeology = archae + o + logy