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Cryptozoon

[krip-tuh-zoh-on] /ˌkrɪp təˈzoʊ ɒn/
noun
1.
an extinct genus of algae from Precambrian and Cambrian times, forming irregularly hemispherical fossil colonies composed of layers of limy precipitate.
Origin of Cryptozoon
1883
From New Latin, dating back to 1883; See origin at crypto-, -zoon
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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