pycnogenol

== English == === Etymology === From pycno- +‎ . This etymology is incomplete. You can help Wiktionary by elaborating on the origins of this term. === Noun === pycnogenol (plural pycnogenols) (organic chemistry) Any of a group of flavonoids extracted from the bark of pine trees, especially proanthocyanidins. An antioxidant dietary supplement containing such an extract. ==== Synonyms ==== OPC proanthocyanidin === See also === grape seed extract Proanthocyanidin on Wikipedia.Wikipedia Grape seed extract on Wikipedia.Wikipedia