| trisect | 1. To cut or divide into three parts. 2. <geometry> To cut or divide into three equal parts. Origin: Pref. Tri- + L. Sectus, p. P. Of secare to cut. See Section. Source: Websters Dictionary (01 Mar 1998) |
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| trisected | <botany> Divided into three parts or segments by incisions extending to the midrib or to the base; said of leaves. Source: Websters Dictionary (01 Mar 1998) |
| trisection | <geometry> The division of a thing into three parts, Specifically: the division of an angle into three equal parts. Origin: Cf. F. Trisection. Source: Websters Dictionary (01 Mar 1998) |