lumennoun [ C ]
uk/ˈluː.mən/us/ˈluː.mən/specializedlumen noun [ C ] (UNIT OF LIGHT)
abbreviation lm physics a unit for measuring the amount of light something produces:
a light bulb rated at 750 lumens
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Miscellaneous units of measurement
- acre
- becquerel
- caloric
- calorific
- curie
- farad
- Gy
- hectare
- hertz
- horsepower
- kilohertz
- kilojoule
- megahertz
- MHz
- molal
- molar
- msec
- newton
- SI unit
- watt
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You can also find related words, phrases, and synonyms in the topics:
Electricity - units
lumen noun [ C ] (IN BODY)
plural lumina lumens medical the inside space of a tube-shaped organ in the body, for example a blood vessel or intestine:
intestinal/vascular lumen
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Substances & structures in the body
- abductor
- accessorius
- adductor
- agonist
- alveolus
- amyloid
- atheroma
- caecum
- grey matter
- gyrus
- hallucis
- hilum
- hilus
- lymph vessel
- periosteum
- peritoneal
- peritoneum
- phosphatase
- platysma
- vitreous humour
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