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

7 March 2025

INTERTRIGO

(noun) chafing between two skin surfaces that are in contact (as in the armpit or under the breasts or between the thighs)


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Coffee Trivia

The Boston Tea Party helped popularize coffee in America. The hefty tea tax imposed on the colonies in 1773 resulted in America switching from tea to coffee. In the lead up to the Revolutionary War, it became patriotic to sip java instead of tea. The Civil War made the drink more pervasive. Coffee helped energize tired troops, and drinking it became an expression of freedom.

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