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Opuntia

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• Optically

  [op-ti-kuh l] /ˈɒp tɪ kəl/ adjective 1. of, relating to, or applying or the principles of optics. 2. constructed to assist sight or to correct defects in vision. 3. of or relating to sight or vision; visual. 4. of or relating to the eye. 5. of or relating to an optician or opticians or to […]

• Optical-isomerism

  noun, Chemistry. 1. stereoisomerism in which the isomers are identical in molecular weight and most chemical and physical properties but differ in their effect on the rotation of polarized light. noun 1. isomerism of chemical compounds in which the two isomers differ only in that their molecules are mirror images of each other See also […]

• Optical-isomer

  noun, Chemistry. 1. any of two or more isomers exhibiting optical isomerism. optical isomer See enantiomer.

• Optical image

  optical image n. An image formed by the refraction or reflection of light.

• Optical-illusion

  noun 1. See under (def 4). [ih-loo-zhuh n] /ɪˈlu ʒən/ noun 1. something that deceives by producing a false or misleading impression of reality. 2. the state or condition of being deceived; misapprehension. 3. an instance of being deceived. 4. Psychology. a perception, as of visual stimuli (optical illusion) that represents what is perceived in […]

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