Definition of "oleoresin"

Pine oleoresin is a complex mixture of about 30 to 50 different terpene molecules, comprised chiefly of diterpene resin acids and monoterpene essential oils, which impart different physical and biotic properties (Zinkel and Russell 1989).

2007, Shibu Jose, Eric J. Jokela, Deborah L. Miller, editors, The Longleaf Pine Ecosystem: Ecology, Silviculture, and Restoration, Springer Science & Business Media, page 43