of, relating to, or belonging to the Cyperaceae, a family of grasslike flowering plants with solid triangular stems, including the sedges, bulrush, cotton grass, and certain rushes. Some are grown as water plants or as ornamental grasses; and Cyperus papyrus is the papyrus plant
Compare juncaceous
Word origin
C19: from New Latin Cypērus type genus, from Latin cypēros a kind of rush, from Greek kupeiros marsh plant, probably of Semitic origin