TRISECT
trisect
(verb) cut in three; “trisect a line”
Source: WordNet® 3.1
Verb
trisect (third-person singular simple present trisects, present participle trisecting, simple past and past participle trisected)
(transitive) to cut into three pieces
(transitive, mathematics) to divide a quantity, angle etc into three equal parts
Source: Wiktionary
Tri*sect", v. t. [imp. & p. p. Trisected; p. pr. & vb. n.
Trisecting.] Etym: [Pref. tri- + L. sectus, p. p. of secare to cut.
See Section.]
1. To cut or divide into three parts.
2. (Geom.)
Definition: To cut or divide into three equal parts.
Source: Webster’s Unabridged Dictionary 1913 Edition