ˈrēˌtēn, ˈreˌ- noun
( -s )
Etymology: Greek rhētinē resin
: a crystalline hydrocarbon C 18 H 18 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