Notched; marked as with notches.Specifically— In botany, having the edge cut into very small scallops, as some leaves. Also crenelate, crenellate.In conchology, an epithet applied to the indented margin of a shell. The fine saw-like edge of the shell of the cockle, which fits nicely into the opposite shell, is a familiar example.In entomology, finely crenate or waved: as, a crenulate margin.