equivalve

& s. [Lat. æquus equal, and valva the leaf or fold of a folding-door] Zoology : A. As adj .: Having two equal valves. Used of bivalve shells. ( Nicholson .) B. As subst.: A bivalve shell, having the two valves of the same size and of the same form. fate, făt, färe, amidst, what, fall,