Definify.com
Webster 1913 Edition
Optically
Op′tic-al-ly
,adv.
1.
By optics or sight.
2.
With reference to optics.
Optically active
,
Optically inactive
(Chem. Physics)
, terms used of certain isomeric substances which, while identical with each other in other respects, differ in this, viz., that they do or do not produce right-handed or left-handed circular polarization of light. See
– optical activity
. Optically positive
, Optically negative
See under
Refraction
.