• synonyms


[fot, foht]
noun Optics.
  1. a unit of illumination, equal to 1 lumen per square centimeter. Abbreviation: ph
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Origin of phot

1915–20; < Greek phōt-, stem of phôs (contraction of pháos) light



  1. variant of photo- before a vowel: photalgia.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for phot

Historical Examples

  • Phot be yez doin' here, young mon, sn'akin' along like a thafe?

    The Missing Tin Box

    Arthur M. Winfield

British Dictionary definitions for phot


  1. a unit of illumination equal to one lumen per square centimetre. 1 phot is equal to 10 000 lux
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Word Origin

C20: from Greek phōs light
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012