lumen

[ loo-muhn ]

/ ˈlu mən /

noun, plural lu·mens, lu·mi·na [loo-muh-nuh]. /ˈlu mə nə/.

Optics. the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. Abbreviation: lm

Anatomy. the canal, duct, or cavity of a tubular organ.

Botany. (of a cell) the cavity that the cell walls enclose.

Origin of lumen

1870–75; <New Latin, special uses of Latin lūmen (stem lūmin-) light, window

Words nearby lumen

lumbricide, lumbricoid, lumbricosis, lumbricus, lumbus, lumen, lumen-hour, lum-hat, Lumholtz's kangaroo, Lumière, Luminaire

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for lumen

Some of the coccoid bodies are formed in the lumen of the gut and Malpighian tubules.
Handbook of Medical Entomology|William Albert Riley
Lumen autem mentium esse dixerunt ad discenda omnia eumdem ipsum Deum a quo facta sunt omnia.
The Catholic World, Vol. X, October 1869|Various
On the dorsal side is a ridge projecting into the lumen of the pharynx.
The Works of Francis Maitland Balfour, Volume 1|Francis Maitland Balfour
Reflection and study had already inclined me, Lumen, to believe in the plurality of the existences of the soul.
Lumen|Camille Flammarion

The large swollen cells are granular, and very frequently there is a granular mass in the lumen of the tubule.
Alcohol: A Dangerous and Unnecessary Medicine, How and Why|Martha M. Allen

British Dictionary definitions for lumen

lumen

/ (ˈluːmɪn) /

noun plural -mens or -mina (-mɪnə)

the derived SI unit of luminous flux; the flux emitted in a solid angle of 1 steradian by a point source having a uniform intensity of 1 candelaSymbol: lm

anatomy a passage, duct, or cavity in a tubular organ

a cavity within a plant cell enclosed by the cell walls

Derived forms of lumen

lumenal or luminal, adjective

Word Origin for lumen

C19: New Latin, from Latin: light, aperture

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medical definitions for lumen

lumen

[ lōō′mən ]

n. pl. lumens

The inner open space or cavity of a tubular organ, as of a blood vessel.

The unit of luminous flux in the International System of Units, equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions.

Other words from lumen

lu′men•al null adj.

Scientific definitions for lumen

lumen

[ lōō′mən ]

Plural lumens lumina

The central space within a tube-shaped body part or organ, such as a blood vessel or the intestine.

The SI derived unit used to measure the amount of light passing through a given area per second. One lumen is equal to the luminous flux passing per unit solid angle from a light source with a strength of one candela.

单词	lumen
释义	lumen [ loo-muhn ] / ˈlu mən / noun, plural lu·mens, lu·mi·na [loo-muh-nuh]. /ˈlu mə nə/. Optics. the unit of luminous flux, equal to the luminous flux emitted in a unit solid angle by a point source of one candle intensity. Abbreviation: lm Anatomy. the canal, duct, or cavity of a tubular organ. Botany. (of a cell) the cavity that the cell walls enclose. Origin of lumen 1870–75; <New Latin, special uses of Latin lūmen (stem lūmin-) light, window Words nearby lumen lumbricide, lumbricoid, lumbricosis, lumbricus, lumbus, lumen, lumen-hour, lum-hat, Lumholtz's kangaroo, Lumière, Luminaire Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 Example sentences from the Web for lumen Some of the coccoid bodies are formed in the lumen of the gut and Malpighian tubules. Handbook of Medical Entomology\|William Albert Riley Lumen autem mentium esse dixerunt ad discenda omnia eumdem ipsum Deum a quo facta sunt omnia. The Catholic World, Vol. X, October 1869\|Various On the dorsal side is a ridge projecting into the lumen of the pharynx. The Works of Francis Maitland Balfour, Volume 1\|Francis Maitland Balfour Reflection and study had already inclined me, Lumen, to believe in the plurality of the existences of the soul. Lumen\|Camille Flammarion The large swollen cells are granular, and very frequently there is a granular mass in the lumen of the tubule. Alcohol: A Dangerous and Unnecessary Medicine, How and Why\|Martha M. Allen British Dictionary definitions for lumen lumen / (ˈluːmɪn) / noun plural -mens or -mina (-mɪnə) the derived SI unit of luminous flux; the flux emitted in a solid angle of 1 steradian by a point source having a uniform intensity of 1 candelaSymbol: lm anatomy a passage, duct, or cavity in a tubular organ a cavity within a plant cell enclosed by the cell walls Derived forms of lumen lumenal or luminal, adjective Word Origin for lumen C19: New Latin, from Latin: light, aperture Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 Medical definitions for lumen lumen [ lōō′mən ] n. pl. lumens The inner open space or cavity of a tubular organ, as of a blood vessel. The unit of luminous flux in the International System of Units, equal to the amount of light given out through a solid angle by a source of one candela intensity radiating equally in all directions. Other words from lumen lu′men•al null adj. The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for lumen lumen [ lōō′mən ] Plural lumens lumina The central space within a tube-shaped body part or organ, such as a blood vessel or the intestine. The SI derived unit used to measure the amount of light passing through a given area per second. One lumen is equal to the luminous flux passing per unit solid angle from a light source with a strength of one candela. The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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