Definition of halogen in English:

halogen

noun ˈhalədʒ(ə)nˈheɪlədʒ(ə)nˈhælədʒən

Chemistry

1Any 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.
〔化〕卤（素）
Example sentencesExamples
- The oxidation number of the halogens other than fluorine is - 1, unless they are bonded to oxygen or a more electronegative halogen.
- Silicon behaves somewhat similarly to carbon, but compounds of silicon and hydrogen or silicon and the halogens (the silanes) are much more reactive than their carbon counterparts.
- For many syntheses, this means using such compounds as hydrocarbons and alcohols, plus inorganic acids, metals, halogens, or other compounds.
- Metals high on the activity series react more vigorously with oxidants including the halogens and the hydronium ion than those lower on the scale.
- Four important chemical family names of elements still widely used are the alkali metals, the alkaline earths, the halogens, and the noble gases.
1. 1.1as 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。
  Example sentencesExamples
  Since most grooming occurs at night, high power halogen lights provide ample vision both front and rear while heated outside rear view mirrors allow for constant visibility.
  In this treatment, the patient is secured to a dentist chair with leather straps and an extremely hot halogen lamp is left inches from their face for hours at a time.
  Both Ceuta and Melilla are now surrounded by 10-foot fences studded with guard towers and movement sensors, topped with barbed wire and halogen searchlights.
  The light source was a halogen lamp and light intensity was varied with neutral density filters.
  The light source was a microscope halogen lamp, which unilaterally illuminated the protruding stump, via a light guide at a site 2-4 cm from the lower cut end.

Derivatives

halogenic

adjectivehaləˈdʒɛnɪkheɪləˈdʒɛnɪk

Chemistry

H-atoms of halogenic acetic acids are partly replaced by halogen atoms.
Example sentencesExamples
- A live television camera and halogenic headlights allow positive identification of the target prior to detonation.
- It is also probable under the limited oxygen control conditions of such a combustion that there will be Carbon Monoxide formed and perhaps even Phosgene as a result of the presence of chlorine (halogenic detergent) and carbon (product of organic combustion and in coal).
- Volcanogenous rocks are found among halogenic formations so commonly that they, together with anhydrite, gypsum and limestone, may be considered as component part of these formations.
- Association of halogenic minerals here is very poor: it consists of gypsum, calcite and sepiolite.

Origin

Mid 19th century: from Greek hals, halo- 'salt' + -gen.

Definition of halogen in US English:

halogen

nounˈhaləjənˈhælədʒən

Chemistry

1Any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.
〔化〕卤（素）
Example sentencesExamples
- Four important chemical family names of elements still widely used are the alkali metals, the alkaline earths, the halogens, and the noble gases.
- The oxidation number of the halogens other than fluorine is - 1, unless they are bonded to oxygen or a more electronegative halogen.
- For many syntheses, this means using such compounds as hydrocarbons and alcohols, plus inorganic acids, metals, halogens, or other compounds.
- Silicon behaves somewhat similarly to carbon, but compounds of silicon and hydrogen or silicon and the halogens (the silanes) are much more reactive than their carbon counterparts.
- Metals high on the activity series react more vigorously with oxidants including the halogens and the hydronium ion than those lower on the scale.
1. 1.1as modifier Denoting lamps and radiant heat sources using a filament surrounded by the vapor of iodine or another halogen.
  （灯，热辐射源）卤素的
  halogen headlights
  Example sentencesExamples
  In this treatment, the patient is secured to a dentist chair with leather straps and an extremely hot halogen lamp is left inches from their face for hours at a time.
  The light source was a halogen lamp and light intensity was varied with neutral density filters.
  Both Ceuta and Melilla are now surrounded by 10-foot fences studded with guard towers and movement sensors, topped with barbed wire and halogen searchlights.
  The light source was a microscope halogen lamp, which unilaterally illuminated the protruding stump, via a light guide at a site 2-4 cm from the lower cut end.
  Since most grooming occurs at night, high power halogen lights provide ample vision both front and rear while heated outside rear view mirrors allow for constant visibility.

Origin

Mid 19th century: from Greek hals, halo- ‘salt’ + -gen.

词汇	halogen
释义	Definition of halogen in English: halogen noun ˈhalədʒ(ə)nˈheɪlədʒ(ə)nˈhælədʒən Chemistry 1Any 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. 〔化〕卤（素） Example sentencesExamples The oxidation number of the halogens other than fluorine is - 1, unless they are bonded to oxygen or a more electronegative halogen. Silicon behaves somewhat similarly to carbon, but compounds of silicon and hydrogen or silicon and the halogens (the silanes) are much more reactive than their carbon counterparts. For many syntheses, this means using such compounds as hydrocarbons and alcohols, plus inorganic acids, metals, halogens, or other compounds. Metals high on the activity series react more vigorously with oxidants including the halogens and the hydronium ion than those lower on the scale. Four important chemical family names of elements still widely used are the alkali metals, the alkaline earths, the halogens, and the noble gases. 1.1as 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。 Example sentencesExamples Since most grooming occurs at night, high power halogen lights provide ample vision both front and rear while heated outside rear view mirrors allow for constant visibility. In this treatment, the patient is secured to a dentist chair with leather straps and an extremely hot halogen lamp is left inches from their face for hours at a time. Both Ceuta and Melilla are now surrounded by 10-foot fences studded with guard towers and movement sensors, topped with barbed wire and halogen searchlights. The light source was a halogen lamp and light intensity was varied with neutral density filters. The light source was a microscope halogen lamp, which unilaterally illuminated the protruding stump, via a light guide at a site 2-4 cm from the lower cut end. Derivatives halogenic adjectivehaləˈdʒɛnɪkheɪləˈdʒɛnɪk Chemistry H-atoms of halogenic acetic acids are partly replaced by halogen atoms. Example sentencesExamples A live television camera and halogenic headlights allow positive identification of the target prior to detonation. It is also probable under the limited oxygen control conditions of such a combustion that there will be Carbon Monoxide formed and perhaps even Phosgene as a result of the presence of chlorine (halogenic detergent) and carbon (product of organic combustion and in coal). Volcanogenous rocks are found among halogenic formations so commonly that they, together with anhydrite, gypsum and limestone, may be considered as component part of these formations. Association of halogenic minerals here is very poor: it consists of gypsum, calcite and sepiolite. Origin Mid 19th century: from Greek hals, halo- 'salt' + -gen. Definition of halogen in US English: halogen nounˈhaləjənˈhælədʒən Chemistry 1Any of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made. 〔化〕卤（素） Example sentencesExamples Four important chemical family names of elements still widely used are the alkali metals, the alkaline earths, the halogens, and the noble gases. The oxidation number of the halogens other than fluorine is - 1, unless they are bonded to oxygen or a more electronegative halogen. For many syntheses, this means using such compounds as hydrocarbons and alcohols, plus inorganic acids, metals, halogens, or other compounds. Silicon behaves somewhat similarly to carbon, but compounds of silicon and hydrogen or silicon and the halogens (the silanes) are much more reactive than their carbon counterparts. Metals high on the activity series react more vigorously with oxidants including the halogens and the hydronium ion than those lower on the scale. 1.1as modifier Denoting lamps and radiant heat sources using a filament surrounded by the vapor of iodine or another halogen. （灯，热辐射源）卤素的 halogen headlights Example sentencesExamples In this treatment, the patient is secured to a dentist chair with leather straps and an extremely hot halogen lamp is left inches from their face for hours at a time. The light source was a halogen lamp and light intensity was varied with neutral density filters. Both Ceuta and Melilla are now surrounded by 10-foot fences studded with guard towers and movement sensors, topped with barbed wire and halogen searchlights. The light source was a microscope halogen lamp, which unilaterally illuminated the protruding stump, via a light guide at a site 2-4 cm from the lower cut end. Since most grooming occurs at night, high power halogen lights provide ample vision both front and rear while heated outside rear view mirrors allow for constant visibility. Origin Mid 19th century: from Greek hals, halo- ‘salt’ + -gen.
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