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单词 graptolite
释义 grap·to·lite
\ˈgraptəˌlīt\ noun
(-s)
Etymology: Greek graptos painted, written (from graphein to write) + -lite
: any of numerous extinct colonial animals (group Graptolitoidea) that are known only as carbonized fossils from Upper Cambrian through Devonian rocks and that have zooids housed in small cups spaced along a chitinous support — compare graptolitoidea
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