cutty grass noun8 •Any of many species of sedge or grass that have leaves with sharp, serrated edges. •Carex geminata (in Carex subg. Carex); •(New-Zealand) Any grass species of the genus Austroderia (toetoe); •Cyperus ustulatus (giant umbrella sedge); •Ficinia spiralis (golden sand sedge); •Gahnia spp. (sawsedge, saw-sedge). •Gahnia grandis (syn. Cladium psittacorum); cutting grass; •Gahnia setifolia (toetoe). formscutty grasses