LUMINESCENCE

luminescence, glow

(noun) light from nonthermal sources

luminescence

(noun) light not due to incandescence; occurs at low temperatures

Source: WordNet® 3.1


Etymology

Noun

luminescence (countable and uncountable, plural luminescences)

(physics) Any emission of light that cannot be attributed merely to the temperature of the emitting body.

Source: Wiktionary


Lu`mi*nes"cence, n. [See Luminescent.]

1. (Physics) Any emission of light not ascribable directly to incandescence, and therefore occurring at low temperatures, as in phosphorescence and fluorescence or other luminous radiation resulting from vital processes, chemical action, friction, solution, or the influence of light or of ultraviolet or cathode rays, etc.

2. (Zoöl.) (a) The faculty or power of voluntarily producing light, as in the firefly and glowworm. (b) The light thus produced; luminosity; phosphorescence.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

27 April 2024

GREAT

(adjective) remarkable or out of the ordinary in degree or magnitude or effect; “a great crisis”; “had a great stake in the outcome”


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Coffee Trivia

Espresso is both a coffee beverage and a brewing method that originated in Italy. When making an espresso, a small amount of nearly boiling water under pressure forces through finely-ground coffee beans. It has more caffeine per unit volume than most coffee beverages. Its smaller serving size will take three shots to equal a mug of standard brewed coffee.

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