bisect

[v. bahy-sekt, bahy-sekt; n. bahy-sekt] /v. baɪˈsɛkt, ˈbaɪ sɛkt; n. ˈbaɪ sɛkt/
verb (used with object)
1.
to cut or divide into two equal or nearly equal parts.
2.
Geometry. to cut or divide into two equal parts:
to bisect an angle.
3.
to intersect or cross:
the spot where the railroad tracks bisect the highway.
verb (used without object)
4.
to split into two, as a road; fork:
There's a charming old inn just before the road bisects.
noun
5.
Also called split. Philately. a portion of a stamp, usually half, used for payment of a proportionate amount of the face value of the whole stamp.
Origin
1640-50; bi-1 + -sect
Related forms
bisection, noun
bisectional, adjective
bisectionally, adverb
Can be confused
bisect, dissect.
British Dictionary definitions for bisect

bisect

/baɪˈsɛkt/
verb
1.
(transitive) (maths) to divide into two equal parts
2.
to cut or split into two
Derived Forms
bisection (baɪˈsɛkʃən) noun
Word Origin
C17: bi-1 + -sect from Latin secāre to cut
Word Origin and History for bisect
v.

"to cut in two," 1640s, from Modern Latin bisectus, from Latin bi- "two" (see bi-) + secare "to cut" (see section (n.)). Related: Bisected; bisecting.

bisect in Science
bisect
  (bī'sěkt', bī-sěkt')   
To cut or divide into two parts, especially two equal parts.