Hüperonüümid:
ajastu 3(n)
ordoviitsium 1(n)

vanaaegkonna teine, kambriumile järgnenud ja silurile eelnenud ajastu ning ladestu (EKSS)

ILI-1.5 relation(s)

eq_synonym

PWN-3.0 relation(s)

eq_synonym
Ordovician 1(n), Ordovician period 1(n) from 500 million to 425 million years ago;conodonts and ostracods and algae and seaweeds

CILI relation(s)

eq_synonym
Ordovician 1(n), Ordovician_period 1(n) from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds