We found one dictionary that defines the word paleosea:

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1. paleosea: Wiktionary

Definitions from Wiktionary (paleosea) ▸ noun:  An ancient sea. ▸ Words similar to paleosea ▸ Usage examples for paleosea ▸ Idioms related to paleosea ▸ Wikipedia articles (New!) ▸ Popular adjectives describing paleosea ▸ Words that often appear near paleosea ▸ Rhymes of paleosea ▸ Invented words related to paleosea