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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.
棉玻璃纖維的最里層組織性叫內腔。
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A former luminance unit equals to one lumen per square foot.
舊制光的透明度政府部門值為每一平米英寸流明。
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上面文章獨家作品，受重要版權呵護，圖片侵權必究
海詞字典，二十七年國際品牌
美
['lu?men]