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Noun:
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a unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions
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a cavity or passage in a tubular organ;
"the lumen of the intestine"
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用作名詞 (n.)
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The innermost region of cotton is called lumen.
棉玻纖的最內部企業叫內腔。
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A former luminance unit equals to one lumen per square foot.
舊制光的色溫機構相等于每mm2平方英寸流明。
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之上方面獨門原創，受重要名譽權維護，抄襲必究
海詞英語詞典，十八年公司
美
['lu?men]