Word Origin & History

"universal sea," such as that which surrounded Pangaea, 1893, from pan- "all" + Gk. thalassa "sea," a word from a lost pre-Gk. Mediterranean language.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Science Dictionary
Panthalassa   (pān'thə-lās'ə)  Pronunciation Key 
The ocean that surrounded the supercontinent Pangaea.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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