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Panthalassa

American  
[pan-thuh-la-suh] / ˌpæn θəˈlæ sə /

noun

  1. Geology. the global ocean surrounding the ancient supercontinent Pangaea.


Panthalassa Scientific  
/ păn′thə-lăsə /
  1. The ocean that surrounded the supercontinent Pangaea.


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

These remains are locked within rock layers that began as soft mud on the seafloor, formed in an ancient ocean that stretched across mid to high paleolatitudes and bordered the massive Panthalassa Super-ocean.

From Science Daily • Dec. 30, 2025

Panthalassa, trained by Yoshito Yahagi and ridden by Yutaka Yoshida, paid $34.10 to win in international pari-mutuel pools.

From Los Angeles Times • Feb. 25, 2023

Sent off at 15-1 odds, Panthalassa ran 1 1/8 miles in 1:50.79 under Yutaka Yoshida.

From Seattle Times • Feb. 25, 2023

Shonisaurus glided barge-like thousands of miles through an ocean known as Panthalassa, the ancient version of today’s Pacific, to breed and deliver their offspring, according to a new study in Current Biology.

From Washington Post • Dec. 19, 2022

By mixing up the contents of the different continents people have recreated, in a virtual form, the world of 200m years ago—a world with but one sea, Panthalassa, and one vast continent, Pangaea.

From Economist • Aug. 3, 2017

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