Ordovician

Tanımlar (İngilizce)

1. sıfat Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago.

   “Against the dark Ordovician gabbro, the black volcanic base, Rhynie is a streak of technicolour.”

2. özel isim The Ordovician period.