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

27 May 2025

DIRECTIONALITY

(noun) the property of being directional or maintaining a direction; “the directionality of written English is from left to right”


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Coffee Trivia

Some 16th-century Italian clergymen tried to ban coffee because they believed it to be “satanic.” However, Pope Clement VII loved coffee so much that he lifted the ban and had coffee baptized in 1600.

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