The Collaborative International Dictionary
Trinervate
Trinervate \Tri*nerv"ate\, a. [NL. trinervatus; pref. tri- + L.
nervus nerve.] (Bot.)
Having three ribs or nerves extending unbranched from the
base to the apex; -- said of a leaf.
--Gray.
Wiktionary
trinervate
a. (context botany of a leaf English) Having three ribs or nerves extending unbranched from the base to the apex.