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BNC: 18116 COCA: 25456

lumen noun [ C ] UNIT OF LIGHT

abbreviation lm physics a unit for measuring the amount of light something produces(光的单位)流明

a light bulb rated at 750 lumens 一只750流明的电灯泡

lumen noun [ C ] IN BODY

plural lumina or lumens medical the inside space of a tube-shaped organ in the body, for example a blood vessel or intestine(身体内的)腔

intestinal/vascular lumen肠道/血管管腔

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