【医】 binoculus
both; double; even; twin; two; twofold【化】 dyad【医】 amb-; ambi-; ambo-; bi-; bis-; di-; diplo-; par
aperture; eye; key point; look; small hole【医】 eye; oculi; oculo-; oculus; ophthalm-; ophthalmo-; ophthalmos ophthalmus