Akademik

Ordovician period

noun

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

• Syn: ↑Ordovician

• Instance Hypernyms: ↑period, ↑geological period

• Part Holonyms: ↑Paleozoic, ↑Paleozoic era

Useful english dictionary. 2012.