Retene

noun

1. A crystalline phenanthrene derivative, C18H18, derived from pine tar, fossil resins, and tar oils.
2. A crystalline hydrocarbon, C18H18, found in resinous woods and certain fossil gums and resins: also made by distilling rosin-oil with sulphur. It is 8-methyl-5-isopropylphenan-threne. It melts at 98.5° C. and boils at 390° C.
3. A white crystalline hydrocarbon, polymeric with benzene. It is extracted from pine tar, and is also found in certain fossil resins.
4. A hydrocarbon, polymeric with benzene, that is extracted from pine tar and also found in certain fossil resins.