Search Result for "geological era":
Wordnet 3.0

NOUN (1)

1. a major division of geological time; an era is usually divided into two or more periods;
[syn: era, geological era]



WordNet (r) 3.0 (2006):

geological era
    n 1: a major division of geological time; an era is usually
         divided into two or more periods [syn: era, geological
         era]