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单词 eurypterid
释义
eu·ryp·ter·id (y-rĭptər-ĭd)
n.
Any of various large segmented aquatic arthropods of the order Eurypterida that existed from the Ordovician Period to the Permian Period, having a long tail often with a spinelike appendage at the tip. Also called sea scorpion.

[From New Latin Eurypterida, order name, from Eurypterus, genus name : EURY- + Greek pteron, wing; see -PTER.]
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