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单词 heterostracan
释义

heterostracan in American English

(ˌhetəˈrɑstrəkən)
noun
Paleontology
any of several ostracoderms of the order Heterostraci, from the Silurian and Devonian Periods, having the anterior part of the body enclosed in bony plates
Word origin
[‹ NL Heterostrac(i) (pl.) name of the order, equiv. to heter- heter- + Gk ostrak(ón) (sing.) shell + -an]
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