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单词 naphthol
释义

WordReference Random House Unabridged Dictionary of American English © 2024
naph•thol  (naf′thôl, -thol, nap′-),USA pronunciation n. [Chem.]
  1. Chemistryeither of two isomeric hydroxyl derivatives, C10H7OH, of naphthalene (alpha-naphthol or 1-naphthol and beta-naphthol or 2-naphthol), white or yellowish crystals, with a phenolic odor, that darken on exposure to light: used chiefly in dyes, drugs, perfumes, and insecticides. Also called hydroxynaphthalene. 
  • naphth- + -ol1 1840–50

Collins Concise English Dictionary © HarperCollins Publishers::
naphthol /ˈnæfθɒl ˈnæp-/ n
  1. a white crystalline solid having two isomeric forms, alpha-naphthol, used in dyes, and beta-naphthol, used in dyes and as an antioxidant. Formula: C10H7OH
Etymology: 19th Century: from naphtha + -ol1
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更新时间：2025/7/23 15:20:13