lambert

< /ˈyoʊ hɑn ˈhaɪn rɪx/, 1728–77, German scientist and mathematician.

a male given name: from Germanic words meaning “land” and “bright.”

noun

1. the cgs unit of illumination, equal to 1 lumen per square centimetreSymbol: L

noun

1. Constant. 1905–51, English composer and conductor. His works include much ballet music and The Rio Grande (1929), a work for chorus, orchestra, and piano, using jazz idioms

masc. proper name, from French, from German Lambert, from Old High German Lambreht, from lant “land” + beraht “bright.” Old English cognate was Landbeorht. The popularity of the name from 12c. is probably due to immigration from Flanders, where St. Lambert of Maestricht was highly venerated. Attested as a surname from mid-12c.

1. A unit of luminance in the centimeter-gram-second system, equivalent to the luminance of a perfectly diffusing surface that emits or reflects one lumen per square centimeter. The lambert is named after the Swiss mathematician and physicist Johann Heinrich Lambert (1728-1777).