Definition of Ordovician in English:
1Of, relating to, or denoting the second period of the Paleozoic era, between the Cambrian and Silurian periods.
- These are overlain by low-grade metamorphosed sediments and volcanics of Ordovician and Silurian age.
- Because of the disparate nature of the Ordovician and Cambrian records, it is difficult to make direct comparison between the two events.
- In contrast, the Ordovician magmatic event postdates the pre-Variscan deformation in the external zone.
1.1 (as noun the Ordovician) The Ordovician period or the system of rocks deposited during it.
Definition of Ordovician in:
- British & World English dictionary