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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
1883
1883; < Neo-Latin; see crypto-, -zoon
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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