单词	retene
释义	retene noun ˈrēˌtēn, ˈreˌ- plural -s : a crystalline hydrocarbon C18H18 isolated especially from pine tar, rosin oil, and various fossil resins but usually prepared from abietic acid and related compounds by dehydrogenation; 1-methyl-7-isopropyl-phenanthrene Word History Etymology Greek rhētinē resin
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