We found 3 dictionaries that define the word panthalassic ocean:

General (1 matching dictionary)

1. Panthalassic Ocean: Wiktionary

Computing (1 matching dictionary)

2. Panthalassic ocean: Encyclopedia

Science (1 matching dictionary)

3. Panthalassic Ocean: Natural History Terms

Definitions from Wiktionary (Panthalassic Ocean) ▸ noun:  Synonym of Panthalassa ▸ Words similar to panthalassic ocean ▸ Usage examples for panthalassic ocean ▸ Idioms related to panthalassic ocean ▸ Wikipedia articles (New!) ▸ Words that often appear near panthalassic ocean ▸ Rhymes of panthalassic ocean ▸ Invented words related to panthalassic ocean