lumen, n.
(lumens, lumina)
(lumens, lumina)
a cavity or passage in a tubular organ
<noun.body>
lumen
sample sentences
"the lumen of the intestine"
semantic pointers
hypernym
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
<noun.quantity>
lm lumen
semantic pointers
hypernym