Dictionary.com
Thesaurus.com

trijugate

American  
[trahy-joo-geyt, trahy-joo-git, -geyt] / ˈtraɪ dʒʊˌgeɪt, traɪˈdʒu gɪt, -geɪt /
Also trijugous

adjective

Botany.
  1. having three pairs of leaflets.


Etymology

Origin of trijugate

First recorded in 1875–80; tri- + jugate