The Collaborative International Dictionary
Quinquevalvular
Quinquevalve \Quin"que*valve\, Quinquevalvular \Quin`que*val"vu*lar\, a. [Quinque- + valve, valvular: cf. F. quinqu['e]valve.] (Bot.) Having five valves, as a pericarp.
Wiktionary
quinquevalvular
a. (alternative form of quinquevalve English)