troland

noun

tro·​land ˈtrō-lənd 

: a unit of intensity of light at the retina equal to the illumination received per square millimeter of a pupillary area from a surface having a brightness of one candle per square meter

Word History

Etymology

after Leonard T. Troland †1932 American psychologist and physicist

First Known Use

1944, in the meaning defined above

Medical Definition

troland

noun

tro·​land ˈtrō-lənd 

: photon sense 1