A.dividing in two, of the moon's quarters, Arist.GA777b22, Gem.9.3, Simp.in Ph.455.22; bisection, Theo Sm.p.184H.
2. point of bisection, Archim.Aequil. 1.6, al.
b. point of division between wings of army, Ascl. Tact.2.6.
II. division into two parts (logically), dichotomy, Arist.PA 644a9, Iamb.Comm.Math.1.