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Definition of Troland
1. a unit of measurement of retinal response to light [n -S]
Medical Definition of Troland
1. A unit of visual stimulation at the retina equal to the illumination per square millimeter of pupil received from a surface of 1 lux brightness. Origin: L.T. Troland, U.S. Physicist, 1889-1932 (05 Mar 2000)