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| an extraordinary or unusual thing, person, or event; an exceptional example or instance. |
| the offspring of a zebra and a donkey. |
| illuminance (ɪˈluːmɪnəns) | |
| —n | |
| Compare irradiance Ev, Sometimes called: illumination the luminous flux incident on unit area of a surface. It is measured in lux | |
illuminance (ĭ-l 'mə-nəns) Pronunciation Key
The luminous flux per unit area at any point on a surface exposed to incident light. It is measured in luxes. Also called illumination. |