HALOGEN

halogen

(noun) any of five related nonmetallic elements (fluorine or chlorine or bromine or iodine or astatine) that are all monovalent and readily form negative ions

Source: WordNet® 3.1


Etymology

Noun

halogen (plural halogens)

(chemistry) Any element of group 17, i.e. fluorine, chlorine, bromine, iodine and astatine, which form a salt by direct union with a metal.

A light fixture in which the filament is surrounded by an atmosphere of a halogen gas,

Source: Wiktionary


Hal"o*gen, n. Etym: [Gr. "a`ls, "alo`s, salt + -gen: cf. F. halogène.] (Chem.)

Definition: An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family, under Chlorine.

Source: Webster’s Unabridged Dictionary 1913 Edition



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Word of the Day

23 November 2024

THEORETICAL

(adjective) concerned primarily with theories or hypotheses rather than practical considerations; “theoretical science”


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Coffee Trivia

An article published in Harvard Men’s Health Watch in 2012 shows heavy coffee drinkers live longer. The researchers examined data from 400,000 people and found out that men who drank six or more coffee cups per day had a 10% lower death rate.

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