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: L- L. La Lb Lc Ld Le Lf Lg Lh Li Lj Ll Lm Lo Lp Lr Ls Lt Lu Lv Lw Lx Ly
lumbrical | lumbriciform | lumbricoid | lumbricus | lumbus | lumen | luminal | luminance | luminance unit | luminant | luminary

lumen

 : 
Noun
 : 
lu=men

CIDE DICTIONARY

lumenn. [L., light, an opening for light.].
  •  A unit of illumination, being the amount of illumination of a unit area of spherical surface, due to a light of unit intensity placed at the center of the sphere.  [Webster 1913 Suppl.]
  •  An opening, space, or cavity, esp. a tubular cavity; a vacuole.  [Webster 1913 Suppl.]

OXFORD DICTIONARY

lumen, 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.

Usage
Abbr.: lm.
2 Anat. (pl. lumina) a cavity within a tube, cell, etc.
Derivative
luminal adj.
Etymology
L lumen luminis a light, an opening

THESAURUS

lumen

ASA scale, British candle, Hefner candle, Scheiner scale, bougie decimale, candle, candle lumen, candle power, candle-foot, candle-hour, candle-meter, decimal candle, exposure meter, flux, foot-candle, intensity, international candle, lamp-hour, light, light meter, light quantum, lumen meter, lumen-hour, lumeter, luminous flux, luminous intensity, luminous power, lux, photon, quantum, unit of flux, unit of light

For further exploring for "lumen" in Webster Dictionary Online


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