2. In anatomy, the space inside any tubular structure in the body: Some of the body tubes, which provide lumen, include the intestines, arteries, and veins.
The surgeon, Dr. Smith, could determine whether there was a blockage in the lumen of his patient's intestine.3. In botany, the cavity within a plant cell wall: The assignment to the students by the botany instructor, Mr. Jones, was to make detailed drawings of the lumen of three different plants, in order to compare their cellular construction.
Motto of St. Gregory's College, Shawnee, Oklahoma, USA.
Motto of Atlantic Christian College, Wilson, North Carolina, USA.
Also translated as, "In Thy light shall we see light." Motto of Columbia University, New York City, USA; the College of Great Falls; Great Falls, Montana; and Ohio Wesleyan University in Delaware, Ohio.
The florescent illumination in Mildred's kitchen started to flicker, apparently because of the lumen depreciation in the tubes.
Motto of Texas College, Tyler, Texas, USA.