Definition of phot in English:

phot

noun

  • A unit of illumination equal to one lumen per square centimeter.

    • ‘Select this table to convert between different units such as lux, flame, phot, nox, lumen/square meter, meter-candle, and more.’
    • ‘A centimeter- candle is a phot.’

Origin

Early 20th century: from Greek phōs, phōt- ‘light’.

Pronunciation

phot

/fōt/