What does "trisection" mean?

The act of division of something (such as an angle, line segment, or circle) into three parts, especially three equal parts.

What is a synonym for "trisection"?

Common synonyms include: one-third, third, trisegmentation.

noun

noun ·Rare ·Advanced level

Noun

1
The act of division of something (such as an angle, line segment, or circle) into three parts, especially three equal parts. countable, uncountable
"A traditional (but impossible) mathematical problem was to achieve trisection using a straight edge and compass."
2
Any of the three portions thus produced. countable, uncountable