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halogen

(hal′ə jən)

noun

any of the five very reactive, nonmetallic chemical elements making up group VIIA of the periodic table: fluorine is the smallest and most reactive of the group, and astatine is the largest and least reactive

Origin: halo- + -gen

Related Forms:

halogenous adjective

See halogen in American Heritage Dictionary 4

noun

Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine.

Origin:

Origin: Swedish

Origin: : halo-, halo-

Origin: + -gen, -gen

Related Forms:

ha·logˈe·nous (hă-lŏjˈə-nəs) adjective

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