lumen — meaning in English

English meaning

• lumen noun The standard unit for measuring the total amount of visible light emitted by a source.

Senses

lumen is used for these senses in English:

• lumen (physics) In the International System of Units, the derived unit of luminous flux; the light that is emitted in a solid angle of one steradian from a source of one candela. Symbol: lm.
• lumen (medicine) The bore of a tube such as a hollow needle or catheter.

lumen — full definition

1. noun The standard unit for measuring the total amount of visible light emitted by a source.
2. noun The hollow space inside a tube or tubular body part, such as a blood vessel or needle.

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