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 Englishsee 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.
Collins English Dictionary. Copyright © HarperCollins Publishers
Webster’s New World College Dictionary, 4th Edition. Copyright © 2010 by Houghton Mifflin Harcourt. All rights reserved.
The American Heritage ® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.