Word:

Ordovician

Or`do`vi´cian
a.1.(Geol.) Of or pertaining to a division of the Silurian formation, corresponding in general to the Lower Silurian of most authors, exclusive of the Cambrian.
Noun1.Ordovician - from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
geological period, Ordovician period, Paleozoic, Paleozoic era, period
Translate Ordovician to Spanish, Translate Ordovician to French
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Ordinary seaman
ordinary shares
Ordinaryship
Ordinate
Ordinate figure
Ordinately
Ordination
Ordinative
Ordinator
Ordine placitandi servato
Ordnance
ordnance stores
Ordnance Survey
Ordonnance
Ordonnant
Ordovian
-- Ordovician --
Ordovician period
Ordure
Ordurous
Ore
ore bed
ore dressing
Ore hearth
ore processing
Ore tenus
Oread
Oreades
Oreamnos
Oreamnos americanus
Orectic
Orectolobidae
Orectolobus
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