Lumen Definition

lo͝omən
lumens, lumina
noun
lumens
The basic unit used to measure the flow of light in the SI system, equal to the amount of light emitted through a solid angle of one steradian by a light source with the intensity of one candela (0.0015 watt)
Webster's New World
The passage within a tubular organ.
Webster's New World
The interior of a membrane-bound compartment or organelle in a cell.
American Heritage Medicine
The bore of a hollow needle, catheter, etc.
Webster's New World
The inner open space or cavity of a tubular organ, as of a blood vessel or an intestine.
American Heritage
Synonyms:
  • lm

Other Word Forms of Lumen

Noun

Singular:
lumen
Plural:
lumens, lumina

Origin of Lumen

  • Latin lūmen an opening, light leuk- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • Latin lūmen an opening, light leuk- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

Lumen Sentence Examples

  • Externally, the nephridium opens by a straight part of the tube, which is often very wide, and here the intracellular lumen becomes intercellular.

  • In Polynoe the nephridia are short tubes with a slightly folded funnel whose lumen is intercellular, and this intercellular lumen is characteristic of the Polychaetes as contrasted with leeches and Oligochaetes.

  • On Easter Eve new fire is made 3 with a flint and steel, and blessed; from this three candles are lighted, the lumen Christi, and from these again the Paschal Candle.

  • Nephridia generally paired, often very numerous in each segment, in the form of long, much-coiled tubes with intracellular lumen.

  • The nephridia in this group are invariably coiled tubes with an intracellular lumen and nearly invariably open into the coelom by a funnel.

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Words Starting With

LLULUM

Words Ending With

NENMEN

Unscrambles

lumen

Words Starting With L and Ending With N

Starts With L & Ends With NStarts With LU & Ends With NStarts With L & Ends With EN

Word Length

5 Letter Words5 Letter Words Starting With L5 Letter Words Ending With N