threesquare means several species of bulrush (biologically, sedges) with a triangular stem:; Schoenoplectus americanus (American threesquare, Olney's bulrush, chairmaker's bulrush). Lexicurio rates it Distinctive — a strength score of 68 out of 100.
noun
- Several species of bulrush (biologically, sedges) with a triangular stem:; Schoenoplectus americanus (American threesquare, Olney's bulrush, chairmaker's bulrush).“In colonial days, threesquare was used to cane chair seats.”
- Several species of bulrush (biologically, sedges) with a triangular stem:; Schoenoplectus pungens (common threesquare, sharp club-rush)