halogen
halogen
[ˈhalədʒ(ə)n, ˈheɪl-]
noun
halogenic
adjective
语源
[ˈhalədʒ(ə)n, ˈheɪl-]
noun
- (Chemistry)any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive non-metallic elements which form strongly acidic compounds with hydrogen from which simple salts can be made
(化)卤（素）
■[as modifier]denoting lamps and radiant heat sources using a filament surrounded by the vapour of iodine or another halogen
（灯，热辐射源）卤素的
a halogen bulb.
卤素灯泡。
halogenic
adjective
语源
- mid 19th cent.: from Greek hals, halo- 'salt' + -gen
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