[loo-muh n] /ˈlu mən/
noun, plural lumens, lumina
[loo-muh-nuh] /ˈlu mə nə/ (Show IPA)
Optics. the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity.
Anatomy. the canal, duct, or cavity of a tubular organ.
Botany. (of a cell) the cavity that the cell walls enclose.
noun (pl) -mens, -mina (-mɪnə)
the derived SI unit of luminous flux; the flux emitted in a solid angle of 1 steradian by a point source having a uniform intensity of 1 candela lm
(anatomy) a passage, duct, or cavity in a tubular organ
a cavity within a plant cell enclosed by the cell walls
unit of luminosity, 1897, coined 1894 by French physicist André-Eugène Blondel (1863-1938) from Latin lumen “light,” related to lucere “to shine” (see light (n.)).
lumen lu·men (lōō’mən)
n. pl. lumens or lu·mi·na (-mə-nə)
lu’men·al or lu’min·al adj.
Plural lumens or lumina
lumbus lum·bus (lŭm’bəs) n. pl. lum·bi (-bī) The loin.
[luhnch-room, -roo m] /ˈlʌntʃˌrum, -ˌrʊm/ noun 1. a , as in a school, where light meals or snacks can be bought or where food brought from home may be eaten. 2. a luncheonette. /ˈlʌntʃˌruːm; -ˌrʊm/ noun 1. (US & Canadian) a room where lunch is served or where students, employees, etc, may eat lunches they […]
[luhn-chee] /ˈlʌn tʃi/ adjective, lunchier, lunchiest. Slang. 1. stupid; dull-witted. 2. carefree or irresponsible. adjective Related Terms eat someone’s lunch, out to lunch, shoot one’s cookies
/lʊnd/ noun 1. a city in SE Sweden, northeast of Malmö: founded in about 1020 by the Danish King Canute; the archbishopric for all Scandinavia in the Middle Ages; university (1668). Pop: 101 427 (2004 est)