LUMEN

Pronunciation (US): (GB):

Irregular inflected form: lumina

I. (noun)

Sense 1

Meaning:

A cavity or passage in a tubular organ

Example:

the lumen of the intestine

Classified under:

Nouns denoting body parts

Hypernyms ("lumen" is a kind of...):

bodily cavity; cavity; cavum ((anatomy) a natural hollow or sinus within the body)

Sense 2

Meaning:

A unit of luminous flux equal to the amount of light given out through a solid angle of 1 steradian by a point source of 1 candela intensity radiating uniformly in all directions

Synonyms:

lm; lumen

Classified under:

Nouns denoting quantities and units of measure

Hypernyms ("lumen" is a kind of...):

luminous flux unit (a measure of luminous flux per unit area)

Credits

Context examples:

A congenital abnormality that results from the failure of the lumen of urachus to be obliterated.

(Patent Urachus, NCI Thesaurus)

The layer of cells that line the lumen of an artery.

(Artery Endothelium, NCI Thesaurus)

The layer of cells that line the lumen of a blood vessel.

(Blood Vessel Endothelium, NCI Thesaurus)

It usually results in the obliteration of the appendiceal lumen.

(Appendix Neuroma, NCI Thesaurus)

P. luminescens is found in the intestinal lumen of entomogenous nematodes and is pathogenic to insects and humans.

(Photorhabdus luminescens, NCI Thesaurus)

Abnormal tissue that results from the progressive accumulation or deposit of certain substances in a body cavity, surface, or lumen.

(Plaque, NCI Thesaurus)

Complete closure of the normally patent lumen of the blood vessels which carry blood away from the heart.

(Arterial Occlusion, NCI Thesaurus)

Macrophages may be present in the alveolar lumens.

(Alveoli Epithelial Hyperplasia of the Mouse Pulmonary System, NCI Thesaurus/MMHCC)

The layer of cells that line the lumen of an arteriole.

(Arteriole Endothelium, NCI Thesaurus)

Forms small glandular structures without prominent gland lumen.