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We found 9 dictionaries with English definitions that include the word priscoan: Click on the first link on a line below to go directly to a page where "priscoan" is defined. General (8 matching dictionaries) Priscoan: Vocabulary.com [home, info] priscoan: Dictionary.com [home, info] Priscoan: Wikipedia, the Free Encyclopedia [home, info] Priscoan: Rhymezone [home, info] priscoan: Free Dictionary [home, info] priscoan: Mnemonic Dictionary [home, info] priscoan: LookWAYup Translating Dictionary/Thesaurus [home, info] Priscoan: Dictionary/thesaurus [home, info] Computing (1 matching dictionary) Priscoan: Encyclopedia [home, info]

Quick definitions from WordNet (Priscoan) ▸ noun:  the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago); no evidence of life