lumen

英語（米国） (en-US) 英語（イギリス） (en-GB)

IPA（発音記号）

/ˈluːmən/

名詞

(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.

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One lumen is barely noticeable in a brightly lit room.

詳細

意味（1）

(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.

意味（2）

(anatomy) The cavity or channel within a tube or tubular organ.

意味（3）

(botany) The cavity bounded by a plant cell wall.

意味（4）

(medicine) The bore of a tube such as a hollow needle or catheter.

lumens （ 複数形 ）

lumina （ 複数形 ）