Source : Webster's Revised Unabridged Dictionary (1913)

Bivalved \Bi"valved\, a.
   Having two valves, as the oyster and some seed pods; bivalve.

Source : WordNet®

bivalved
     adj : used of mollusks having two shells (as clams etc.) [syn: {bivalve}]
           [ant: {univalve}]