#lumen



English

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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
    • Pos: noun
    • a cavity or passage in a tubular organ
    • Pos: noun

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فارسی

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    • لومن( واحد تابش)
    • واحد تشعشع برابر مقدار نورى که از يک شمع معمولى بين المللى ساطع ميگردد
    • (تش).حفره يا مجراى عضو لوله اى شکل
    • (گ.ش ).حفره سلولى درون جدار گياه

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