Definition of Ordovician

1. Noun. From 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds.

Exact synonyms: Ordovician Period
Group relationships: Paleozoic, Paleozoic Era
Generic synonyms: Geological Period, Period

Definition of Ordovician

1. a. Of or pertaining to a division of the Silurian formation, corresponding in general to the Lower Silurian of most authors, exclusive of the Cambrian.

Definition of Ordovician

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

2. Proper noun. (geology) The Ordovician period. ¹

¹ Source: wiktionary.com

Medical Definition of Ordovician

1. Of or pertaining to a division of the Silurian formation, corresponding in general to the Lower Silurian of most authors, exclusive of the Cambrian. The Ordovician formation. Origin: From L. Ordovices, a Celtic people in Wales. Source: Websters Dictionary (01 Mar 1998)

Lexicographical Neighbors of Ordovician

ordinees
ordines
ordnance
ordnance stores
ordnances
ordo
ordoliberal
ordoliberalism
ordoliberals
ordonezite
ordonnance
ordonnances
ordonnant
ordos
ordovian
ordovician (current term)
ordre
ordrely
ordres
ords
ordures
ordurous
ore
ore bed
ore bodies
ore body
ore dressing
ore processing
ore tenus

Other Resources:

Search for Ordovician on Dictionary.com!Search for Ordovician on Thesaurus.com!Search for Ordovician on Google!Search for Ordovician on Wikipedia!