Student Dictionary

One entry found for lumen.
Main Entry: lu·men
Pronunciation: primarystresslü-mschwan
Function: noun
Inflected Form(s): plural lumens also lu·mi·na /-mschwa-nschwa/
: a unit of light quantity equal to the light on a unit surface all points of which are at a unit distance from a point source of light having a strength of one candle

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