Dictionary

lumen en · NOUN

Pronunciation

• /ˈluːmən/ (Received-Pronunciation)
• /ˈlumən/ (General-American)
• (UK) audio
• lo͞oʹmən (General-American)

Etymology

Borrowed from Latin lūmen (“light, an opening”). Use as a unit was first adopted by French physicist André Blondel in 1894.

Meanings

1. 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.
2. The cavity or channel within a tube or tubular organ.
3. The cavity bounded by a plant cell wall.
4. The bore of a tube such as a hollow needle or catheter.

Forms

Deriveds

lumen-hour · lumen-second · lumened · lumenless · lumenogenesis · endolumen · lumenal · lumenize · kilolumen · teralumen · lumenally · lumen method · multilumen · lumen second · decalumen

Relateds

lux · luminal · candela

Translations (32)

ro lumen (SI-unit for luminous flux) · el λούμεν (SI-unit for luminous flux) · ko 내강 (anatomy: cavity within tubular organ) · ar لُومِن (SI-unit for luminous flux) · fi luumen (SI-unit for luminous flux) · ko 루멘 (SI-unit for luminous flux) · cmn 內腔 /内腔 (anatomy: cavity within tubular organ) · tl lumen (SI-unit for luminous flux) · ru лю́мен (SI-unit for luminous flux) · fr lumen (SI-unit for luminous flux) · pl lumen (SI-unit for luminous flux) · id lumen (SI-unit for luminous flux) · ro lumen (anatomy: cavity within tubular organ) · fi ontelo (botany: cavity bounded by cell wall) · de Lumen (SI-unit for luminous flux) · ru по́лость (botany: cavity bounded by cell wall) · pt lúmen (SI-unit for luminous flux) · he נהור (anatomy: cavity within tubular organ) · fi lumen (medicine: bore of a tube) · cmn 流明 (SI-unit for luminous flux) · pt lúmen (anatomy: cavity within tubular organ) · fi ontelo (anatomy: cavity within tubular organ) · fi lumen (anatomy: cavity within tubular organ) · ja 内腔 (anatomy: cavity within tubular organ) · ja ルーメン (SI-unit for luminous flux) · fi lumen (botany: cavity bounded by cell wall) · ro lumen (botany: cavity bounded by cell wall) · sv lumen (SI-unit for luminous flux) · ms lumen (SI-unit for luminous flux) · hy լյումեն (SI-unit for luminous flux) · cs lumen (SI-unit for luminous flux) · th ลูเมน (SI-unit for luminous flux)