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1. Oxford American Dictionary

   lumen

   • IPA[ˈlo͞omən]

   美式

   • n.
     the central cavity of a tubular or other hollow structure in an organism or cell

   • noun: lumen, plural noun: lumina

2. • 釋義

   n.

   名詞

   • 1. the central cavity of a tubular or other hollow structure in an organism or cell the stomach empties food into the lumen of the small intestine
3. • 更多解釋

   lumen

   • IPA[ˈlo͞omən]

   美式

   • n.
     the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid ...

   Oxford American Dictionary

   lumen

   • IPA[ˈl(j)uːmɪn]

   英式

   • n.
     the SI unit of luminous flux, equal to the amount of light emitted per second in a unit solid ...

   Oxford Dictionary

   lumen

   • IPA[ˈl(j)uːmɪn]

   英式

   • n.
     the central cavity of a tubular or other hollow structure in an organism or cell: the stomach empties food into the lumen of the small intestine

   Oxford Dictionary