transcription, транскрипция: [ ˈlu:mən ]
n. 1 Physics the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid angle of one steradian from a uniform source of one candela. °Abbr.: lm. 2 Anat. (pl. lumina) a cavity within a tube, cell, etc. øøluminal adj. [L lumen luminis a light, an opening]