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单词 anaspid
释义

anaspid in American English

(əˈnæspɪd)
noun
Paleontology
any member of an extinct order, Anaspida, of small, freshwater jawless fishes of the Silurian and Devonian periods, characterized by a single nostril, narrow rows of scales, and, usually, an armor-plated head
Word origin
[‹ NL Anaspida name of the order, equiv. to an- an-3 + Gk aspid- (s. of aspís shield) + -a neut. pl. n. ending]
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