lumen-, lumin-, lum-
(Latin: light, shine; torch, lamp; heavenly body)
Josie limned her neighbor as an unfriendly and egotistical woman who didn't want anyone to bother her.2. Etymology: altered from Middle English lumine, "to illuminate manuscripts"; from Old French luminer; from Latin luminare, "to illuminate, to burnish"; from lumen, luminis, "radiant energy, light".
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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.
The florescent illumination in Mildred's kitchen started to flicker, apparently because of the lumen depreciation in the tubes.
2. A reference to a unit of measurement of the amount of brightness that comes from a source of lucidity: The candle appeared to cause a luminal measure of luster equal to a very small incandescent night light.
2. A measure of the brightness on an external area that is equal to the amount of luminous flux arriving at, passing through, or reflecting from the surface of something: The challenge for the physics students was to create a working model to measure the luminance of various light fixtures used in daily life; such as, kitchen lights, desk lights, lights on the computer, etc.
Luminance is measured in candelas per square meter. A "candela" is the basic unit of luminous intensity adopted under the Systeme International d'Unites; equal to 1/60 of the luminous intensity per square centimeter of a black body radiating at the temperature of 2,046 degrees Kelvin, or the solidification of platinum.
Originally luminaria was the plural of "luminatrium"; however, luminaria is presented in some dictionaries as both a singular and a plural form.
Many luminaries were attending the opening of the opera season.2. An object, especially a celestial body, that emits effulgence: John, the astronomer, discovered a new luminary, a bright star in the Southern Hemisphere.
The sun is just one of the thousands of luminaries in the sky.3. Etymology: from Late Latin luminare, "light, torch, lamp, heavenly body"; literally "that which gives light"; from Latin lumen, luminis, "light"; related to lucere, "to shine".
The sense of "a notable person" is first recorded in the 1690s, although the Middle English word also had a figurative sense of "a source of spiritual light, an example of holiness".
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2. Any radiation of glimmer from a body produced by some means other than heat: Carol noticed that when she rubbed the fur of her cat on a dry evening, she could hear a crackle and see some luminescence in the form of sparks.
3. Any emission of effulgence at temperatures below that required for incandescence: Sharon is satisfied with the luminescence in her kitchen that is provided by her fluorescent light bulbs.
2. A person who is versed in the study of books with colored illustrations: As a result of her artistic abilities and specialization in ancient manuscripts, Julie was hired by the library as a luminologist to catalogue and repair the illuminations in the manuscript collection.
2. An atom or atomic grouping in an organic compound that increases its ability to produce light: The marine biologists were studying how to increase the luminophore in certain oceanic organisms and thereby increase the ability of such organisms to phosphoresce.