retene

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun A crystalline phenanthrene derivative, C₁₈H₁₈, derived from pine tar, fossil resins, and tar oils.

from The Century Dictionary.

• noun 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.

from the GNU version of the Collaborative International Dictionary of English.

• noun (Chem.) A white crystalline hydrocarbon, polymeric with benzene. It is extracted from pine tar, and is also found in certain fossil resins.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun organic chemistry A hydrocarbon, polymeric with benzene, that is extracted from pine tar and also found in certain fossil resins.