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单词 diprionidian
释义 diprionidian, a. Palæont.|daɪpraɪəʊˈnɪdɪən|
[f. Gr. δι- twice (di-2) + πρίων a saw.]
Having serrations on both sides of the stem: said of graptolites.
1872Nicholson Palæont. 82 Two leading types may be distinguished amongst the Graptolites..‘monoprionidian’ and ‘diprionidian’.
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