phot noun. [fǝʊt] L19.
[French from Greek phōt-, phōs light.]
Physics.
1. A unit of the product of illumination and duration, equal to one lux maintained for one second. Only in L19.

2. A unit of illumination equal to 10,000 lux (one lumen per square centimetre). E20.

[TahlilGaran] English Dictionary ▲