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lu•men



Pronunciation: (lOO'mun), [key]
n.,
pl. -mens, -mi•naPronunciation: (-mu-nu). [key]

1. 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. Abbr.: lm
2. Anat.the canal, duct, or cavity of a tubular organ.
3. Bot.(of a cell) the cavity that the cell walls enclose.

Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.

lumbricoidlumen-hour
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