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单词 piperonal
释义

WordReference Random House Unabridged Dictionary of American English © 2024
pi•per•o•nal  (pi perə nal′, pī-, pipər ə-),USA pronunciation n. [Chem.]
  1. Chemistrya white, crystalline, water-insoluble aldehyde, C8H6O3, which darkens on exposure to light: used chiefly in perfumery and organic synthesis. Also called piperonyl aldehyde, heliotropin. 
  • piper(ine) + -one + -al1 1865–70

Collins Concise English Dictionary © HarperCollins Publishers::
piperonal /ˈpɪpərəʊˌnæl/ n
  1. a white fragrant aldehyde used in flavourings, perfumery, and suntan lotions. Formula: C8H6O3
    Also called: heliotropin
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