Entomology definition of Trichotomous September 14, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Trichotomous Entomology definition of Trichotomous: divided by threes. Entomology Trichotomous definitionTrichotomous Entomology explanationTrichotomous Entomology meaningReviews & Comments