| luminous flux | The quantity of light emitted from a point source in a given time; its unit is the lumen. (05 Mar 2000) |
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| luminous intensity | The luminous flux per unit solid angle in a given direction. Synonym: candle-power, radiant intensity. (05 Mar 2000) |
| luminous retinoscope | <instrument> A portable optical device providing either a circular or linear (streak) beam of light. (05 Mar 2000) |
| lumirhodopsin | <protein> Altered form of rhodopsin produced as a result of illumination. (18 Nov 1997) |
| lumisome | <cell biology> SuB-cellular membrane enclosed vesicle that is the site of bioluminescence in some marine coelenterates. Origin: Gr. Soma = body (18 Nov 1997) |
| lumisterol | 1. A by-product in ergocalciferol biosynthesis. 2. A phosphorylated derivative of ribulose that is an intermediate in the pentose monophosphate shunt. (05 Mar 2000) |