Search Result for "ordovician_period":
Wordnet 3.0

NOUN (1)

1. from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds;
[syn: Ordovician, Ordovician period]



WordNet (r) 3.0 (2006):

Ordovician period
    n 1: from 500 million to 425 million years ago; conodonts and
         ostracods and algae and seaweeds [syn: Ordovician,
         Ordovician period]