TRISECT'ING, ppr. Dividing into three equal parts.
Trisect Tri*sect", v. t. [imp. & p. p. Trisected; p. pr. & vb. n. Trisecting.] [Pref. tri- + L. sectus, p. p. of secare to cut. See Section.] 1. To cut or divide into three parts. 2. (Geom.) To cut or divide into three equal parts.