Dictionary

halogen

1halogen

noun hal·o·gen \ˈha-lə-jən\

Definition of HALOGEN

:  any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VIIA of the periodic table and exist in the free state normally as diatomic molecules
ha·log·e·nous \ha-ˈlä-jə-nəs\ adjective

Origin of HALOGEN

Swedish, from hal- + -gen
First Known Use: 1842

2halogen

adjective

Definition of HALOGEN

:  containing, using, or being a halogen <a halogen lamp>

First Known Use of HALOGEN

1880

halogen

noun halo·gen \ˈhal-ə-jən\   (Medical Dictionary)

Medical Definition of HALOGEN

:  any of the five elements fluorine, chlorine, bromine, iodine, and astatine that form part of group VII A of the periodic table and exist in the free state normally as diatomic molecules
ha·log·e·nous \ha-ˈläj-ə-nəs\ adjective

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