biplane
both; double; even; twin; two; twofold【化】 dyad【医】 amb-; ambi-; ambo-; bi-; bis-; di-; diplo-; par
aid; ala; limb; pinna; wing【医】 ala; alae; flange; pinna; ptero-; pterygo-; wing
aeroplane; airplane; plane【机】 aeroplane; airplane