/ ˈluːmen; NAmE / noun
( abbr. lm ) ( physics ) a unit for measuring the rate of flow of light
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WORD ORIGIN
late 19th cent.: from Latin , literally light .
/ ˈluːmen; NAmE / noun
( abbr. lm ) ( physics ) a unit for measuring the rate of flow of light
••
WORD ORIGIN
late 19th cent.: from Latin , literally light .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005