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A crystalline phenanthrene derivative, C18H18, derived from pine tar, fossil resins, and tar oils.
[From Greek rhētīnē, resin.]
(Elements & Compounds) a yellow crystalline hydrocarbon found in tar oils from pine wood and in certain fossil resins. Formula: C18H18
[C19: from Greek rhētinē resin]
re•tene(ˈri tin, ˈrɛt in)
a crystalline hydrocarbon, C18H18, derived from pine tar and other resins, and used in organic synthesis.