Jisho

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ふでいし 筆石
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Noun
1. graptolite (extinct Paleozoic-era invertebrate)​Usually written using kana alone
Wikipedia definition
2. Graptolithinia​Graptolithina is a class in the animal phylum Hemichordata, the members of which are known as Graptolites. Graptolites are fossil colonial animals known chiefly from the Upper Cambrian through the Lower Carboniferous. A possible early graptolite, Chaunograptus, is known from the Middle Cambrian. The name graptolite comes from the Greek graptos, meaning "written", and lithos, meaning "rock", as many graptolite fossils resemble hieroglyphs written on the rock.
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Read “Graptolithinia” on DBpedia
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フデイシ

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