The degree of optical activity of a solution

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

An image that is visually deceptive or misleading.

(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.

Alternative spelling of fibre optic

Alternative spelling of fibre optic

(American spelling) Alternative form of fibre optics

Alternative spelling of fibre optics

(American spelling) Alternative form of optical fibre