Pronunciation: tr ī - ' kä-t ə -m ə s
Function: adjective
Etymology: Late Greek trichotomein to trisect, from Greek tricha in three (akin to treis three) + -tomein (akin to temnein to cut) ― more at THREE , TOME
Date: 1800
: divided or dividing into three parts or into threes < trichotomous branching>
– tri · chot · o · mous · ly adverb