lumen

A unit of luminous flux in the International System of Units, or a cavity or passage within a tubular organ.

• 🇩🇪Einheit des Lichtstroms im Internationalen Einheitensystem, oder Hohlraum bzw. Durchgang innerhalb eines röhrenförmigen Organs.

1. Unit of light C1 formal scientific

   A standard unit used to measure the total amount of visible light emitted by a source per unit of time.

   • A standard 60-watt bulb produces about 800 lumens.
   • The flashlight's brightness is rated at 1000 lumens.
   • Lumens measure the total light output, not the energy used.

   🇩🇪Lumen

2. Anatomical cavity C2 formal medical

   The inner open space or channel within a tubular structure in the body, such as a blood vessel or the intestine.

   • The surgeon examined the lumen of the artery for blockages.
   • Nutrients are absorbed through the lining of the intestinal lumen.
   • The lumen of the bronchial tube can narrow during an asthma attack.

   🇩🇪Anatomisches Lumen

   Synonyme: cavitychannelhollowinteriorspace

• lumens plural form
• lumina plural form
• lumens' possessive plural form
• lumina's possessive plural form
• lumen's possessive singular form