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lumen Definition

lu·men (lo̵̅o̅′mən)

noun pl. -·mens or -·mina-mi nə

  1. 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): abbrev. lm
  2. the bore of a hollow needle, catheter, etc.
  3. Anat. the passage within a tubular organ

Etymology: ModL < L, light

lumen Usage Examples

Converse of object

have: Arterioles: Larger arterioles have a lumen less than 100 to 300 &microm in diameter.

Adjective modifier

  • thylakoid: The transit peptide is very similar in structure to a family of nuclear proteins imported into the thylakoid lumen.
  • intestinal: The desquamation of such cells into the intestinal lumen leads to the excretion of the copper.
  • er: The space within the ER is called the ER lumen.

Modifies a noun

  • gentium: Lumen Gentium spoke of God's people on the move through history.
  • brightness: It has 1500 ANSI lumen brightness with ultra-quiet fan noise.
  • projector: Powerful 2000 lumen DLP projector at a great price!
  • lamp: VAT ) uses a 1300 ANSI lumen lamp to produce an image that is more than bright enough for any setting.
  • output: In practice, we found the unit to be highly usable with the 1800 ANSI lumens output being bright in all standard office conditions.
  • rating: The lumen rating of a lamp is a measure of the total light output of the lamp.

Noun used with modifier

  • gut: High protein diets for example increase the number of clostridia present in the gut lumen.
  • vessel: Next, pass the needle from inside to out and back in to the vessel lumen.
  • airway: In asthma, the bronchial epithelium is often damaged, with shedding of the columnar cells into the airway lumen.
  • bowel: In bowel obstruction fluid is secreted into the bowel lumen.

Preposition: of

  • intestine: After ingestion of the cysts by a human host, excystation occurs within the lumen of the small intestine.
  • artery: The lower blade of the scissors should be placed in the lumen of the artery with care.
  • brightness: And you can count on crisp images in any lighting, thanks to a 2000:1 contrast ratio and 1000 max ANSI lumens of brightness.
  • light: Fluorescent lights give the maximum lumen of light per watt of energy and are therefore very energy efficient.
  • output: With a massive 120 lumens of output the Z-3 makes a great flashlight whether gun mounted or carried by hand.

Preposition: per

watt: There are several advantages to HPS lamps: The efficiency, in terms of lumens per watt, is high.