Roget's Thesaurus of English Words and Phrases by Peter Mark Roget

91. [Division into two parts.] bisection — N. bisection, bipartition;

dichotomy, subdichotomy†; halving &c v.; dimidiation†. bifurcation, forking, branching, ramification, divarication; fork, prong; fold. half, moiety. V. bisect, halve, divide, split, cut in two, cleave dimidiate†, dichotomize. go halves, divide with. separate, fork, bifurcate; branch off, out; ramify. Adj. bisected &c v.; cloven, cleft; bipartite, biconjugate†, bicuspid, bifid; bifurcous†, bifurcate, bifurcated; distichous, dichotomous, furcular†; semi-, demi-, hemi†.