pref. compounded of BI- pref.2 and TRI-, expressing a possibility of either a double or triple degree of the conformation specified; as in bitripartite, divided into two or three parts, bitripinnatifid, bitriseptate, etc.
1845. Lindley, Sch. Bot., iv. (1858), 28. Leaves tripartite, or bi-tripartite.
1851. Richardson, Geol. (1855), 182. Leaves bitripinnatifid.
1870. Hooker, Stud. Flora (1878), 490.
1871. M. Cooke, Fungi (1874), 40. The spores are bi-triseptate.
