unifoliolate

adjective

uni·​fo·​li·​o·​late ˌyü-nə-ˈfō-lē-ə-ˌlāt 

of a leaf

: compound but having only a single leaflet and distinguishable from a simple leaf by the basal joint

Word History

Etymology

uni- + Late Latin foliolum leaflet, diminutive of Latin folium leaf

First Known Use

circa 1859, in the meaning defined above