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Definition of Calymmian
1. Adjective. (geology) of a geologic period within the Mesoproterozoic era from about 1600 to 1400 million years ago ¹
2. Noun. (geology) the Calymmian period ¹
¹ Source: wiktionary.com
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1. Adjective. (geology) of a geologic period within the Mesoproterozoic era from about 1600 to 1400 million years ago ¹
2. Noun. (geology) the Calymmian period ¹
¹ Source: wiktionary.com