• (a.) Of or pertaining to an extensive forest in Germany, of which there are still portions in Swabia and the Hartz mountains.
Her·cyn'i·an adjective [ Latin Hercynia silva, Hercynius saltus, the Hercynian forest; confer Greek ... ....] Of or pertaining to an extensive forest in Germany, of which there are still portions in Swabia and the Hartz mountains.