Look up: Phanerozoic

1. Phanerozoic
   n. The geologic eon that includes the interval of time from approximately 543 million years ago to the present, comprising the Paleozoic, Mesozoic, and Cenozoic eras.
   Found on http://www.ucmp.berkeley.edu/glossary/gl
   
   
2. Phanerozoic
   Phanerozoic eon noun the period from about 5,400 million years ago until the present
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
3. Phanerozoic
   Geologic eon that occurs from 2500 million years ago to today. During this time period, life becomes more diversified and complex.
   Found on http://www.physicalgeography.net/physgeo
   
   
4. Phanerozoic
   The period of time, also known as an eon, between the end of the Precambrian and today, The Phanerozoic begins with the start of the Cambrian period, 544 million years ago. It encompasses the period of abundant, complex life on the Earth.
   Found on http://geology.er.usgs.gov/paleo/glossar
   
   
5. Phanerozoic
   The `Phanerozoic` (Brit. `Phanærozoic`) Eon is the current eon in the geologic timescale, and the one during which abundant animal life has existed. It covers roughly 542 million years and goes back to the time when diverse hard-shelled animals first appeared. Its name derives from the Greek word...
   Found on http://en.wikipedia.org/wiki/Phanerozoic