The Collaborative International Dictionary
Multivalvular
Multivalve \Mul"ti*valve\, Multivalvular \Mul`ti*val"vu*lar\, a.
Having many valves.
(Zo["o]l.) Many-valved; having more than two valves; -- said of certain shells, as the chitons.
Wiktionary
multivalvular
a. Having or relating to multiple valves.