Unnumbered source etymology
Original entry ↗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. · The cavity or channel within a tube or tubular organ. · The cavity bounded by a plant cell wall. · The bore of a tube such as a hollow needle or catheter.
Etymology tree Proto-Indo-European *lewk- Proto-Indo-European *-s- Proto-Indo-European *-mn̥ Proto-Indo-European *léwksmn̥ Proto-Italic *louksmən Latin lūmenbor. English lumen Borrowed from Latin lūmen (“light, an opening”). Use as a unit was first adopted by French physicist André Blondel in 1894.
Inspect preserved source fields
Raw extraction fields are retained for auditing. Their order does not establish ancestry.
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"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.",
"The cavity or channel within a tube or tubular organ.",
"The cavity bounded by a plant cell wall.",
"The bore of a tube such as a hollow needle or catheter."
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