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单词 halogen
释义

WordReference Random House Learner's Dictionary of American English © 2024
hal•o•gen /ˈhælədʒən, -ˌdʒɛn, ˈheɪlə-/USA pronunciation   n. 
  1. Chemistryany of various elements, as fluorine, chlorine, iodine, and bromine, that have properties in common: [uncountable]the use of halogen in lamps.[countable]halogens as health hazards.

WordReference Random House Unabridged Dictionary of American English © 2024
hal•o•gen  (hal′ə jən, -jen′, hā′lə-),USA pronunciation n. [Chem.]
  1. Chemistryany of the electronegative elements, fluorine, chlorine, iodine, bromine, and astatine, that form binary salts by direct union with metals.
  • 1835–45; halo- + -gen
ha•log•e•nous  (ha loj′ə nəs),USA pronunciation adj. 
Collins Concise English Dictionary © HarperCollins Publishers::
halogen /ˈhæləˌdʒɛn/ n
  1. any of the chemical elements fluorine, chlorine, bromine, iodine, and astatine. They are all monovalent and readily form negative ions
Etymology: 19th Century: from Swedish; see halo-, -gen

halogenous /həˈlɒdʒɪnəs/ adj
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更新时间：2025/2/23 1:34:01