Hercynian
Concise Oxford English Dictionary © 2008 Oxford University Press:
Hercynian /həːˈsɪnɪən/
▶adjective Geology denoting a major mountain-forming period in western Europe, eastern North America, and the Andes, in the Upper Palaeozoic era.
– origin C16: from L. Hercynia silva, the ancient name of an area of forested mountains in central Germany.
'Hercynian' also found in these Oxford entries:
