ganoid
gan.oid \'gan-.o.id\ \ga-'no.id-e--*n\ aj [deriv. of Gk ganos brightness; akin to Gk ge-thein to rejoice -m more at JOY : of or relating to a subclass (Ganoidei) of living and extinct teleost f ishes (as the sturgeons) with usu. hard rhombic enameled scales - ganoid n