Search Result for "phanerozoic": 
Wordnet 3.0

NOUN (1)

1. the period from about 5,400 million years ago until the present;
[syn: Phanerozoic, Phanerozoic eon, Phanerozoic aeon]



WordNet (r) 3.0 (2006):

Phanerozoic
    n 1: the period from about 5,400 million years ago until the
         present [syn: Phanerozoic, Phanerozoic eon,
         Phanerozoic aeon]