Definition of Ordovician in English :

Define Ordovician in English

Ordovician meaning in English

Meaning of Ordovician in English

Pronunciation of Ordovician in English

Ordovician pronunciation in English

Pronounce Ordovician in English


see synonyms of ordovician


1. ordovician, ordovician period

from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds

WordNet Lexical Database for English. Princeton University. 2010.


see synonyms of ordovician
of, denoting, or formed in the second period of the Palaeozoic era, between the Cambrian and Silurian periods, which lasted for 45 000 000 years during which marine invertebrates flourished
2.  the Ordovician

Collins English Dictionary. Copyright © HarperCollins Publishers


see synonyms of ordovician
[sometimes o-]
designating or of the second geologic period of the Paleozoic Era, characterized by the development of abundant marine invertebrates and the first vertebrates

Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.


see synonyms of ordovician
Of, relating to, or being the period of geologic time from about 488 to 444 million years ago, the second period of the Paleozoic Era. It is characterized by a major increase in marine biodiversity and the appearance of the supercontinent Gondwana. Some evidence suggests that the first land plants appeared at this time. See Table at geologic time.
The Ordovician Period.

The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.