| 单词 | naphthene |
| 释义 | naphthene —naphthenic /naf thee"nik, -then"ik, nap-/, adj. /naf"theen, nap"-/, n. Chem. any 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] |
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