Que tem duas valvas iguais.
(De equi... + valva)
cu-i
e-qui-val-ve
salve, conivalve, polivalve, homovalve, ineqüivalve, quadrivalve, univalve, qüinqüevalve, evalve, fistulivalve, plurivalve, multivalve, trivalve, octovalve, bivalve