(physics) a property caused by asymmetrical molecular or crystal structure that enables a compound or crystal to rotate the plane of incident polarized light

(chemistry) Any one of a number of compounds that exhibit optical isomerism.

(chemistry, of a crystal or compound) Exhibiting optical activity.

Alternative spelling of fibre optic

Alternative spelling of fibre optic

(American spelling) Alternative form of optical fibre

Alternative spelling of fibre optic

Of, or relating to fibre optics, or to optical fibre.

(British spelling) A thin, transparent, flexible fibre, made of glass or plastic, used for transmitting light.

The colours of the rainbow. / (physics) The distribution of colours produced when white light passes through a prism. / (astronomy, physics) The range of frequencies of visible light.