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单词 naphthene
释义

WordReference Random House Unabridged Dictionary of American English © 2024
naph•thene  (naf′thēn, nap′-),USA pronunciation n. [Chem.]
  1. Chemistryany of a group of hydrocarbon ring compounds of the general formula, CnH2n, derivatives of cyclopentane and cyclohexane, found in certain petroleums.
  • 1840–50; naphth- + -ene
naph•the•nic  (naf thē′nik, -then′ik, nap-),USA pronunciation adj. 
Collins Concise English Dictionary © HarperCollins Publishers::
naphthene /ˈnæfθiːn ˈnæp-/ n
  1. any of a class of cycloalkanes, mainly derivatives of cyclopentane, found in petroleum
Etymology: 20th Century: from naphtha + -ene
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