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1. Oxford Dictionary

   halogen

   • IPA[ˈhalədʒ(ə)n]

   英式

   • n.
     any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive non-metallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.；denoting lamps and radiant heat sources using a filament surrounded by the vapour of iodine or another halogen

   • noun: halogen, plural noun: halogens

2. • 釋義
   • 相關詞

   n.

   名詞

   • 1. any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive non-metallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.
   • ▪ denoting lamps and radiant heat sources using a filament surrounded by the vapour of iodine or another halogen a halogen bulb

   quartz-halogen

   • adj.
     (of a high-intensity electric lamp) using a quartz bulb containing the vapour of a halogen, ... a quartz-halogen projection lamp

   Oxford Dictionary

   halogen lamp

   • n.
     a lamp using a filament surrounded by the vapour of iodine or another halogen: halogen lamps are 25% more efficient than regular incandescent bulbs

   Oxford Dictionary

   quartz-halogen

   • adj.
     (of a high-intensity electric lamp) using a quartz bulb containing the vapor of a halogen, ... a quartz-halogen projection lamp

   Oxford American Dictionary

3. • 更多解釋

   halogen

   • IPA[ˈhaləj(ə)n]

   美式

   • n.
     any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA ...

   Oxford American Dictionary