agnath

名词 n.
中文释义
发音 ăgʹnəth

英文释义

名词 n.
  1. An agnathan.
    — Evolution of vertebrates was accompanied by a gradual increase in oxygen availability, from the irrespirable atmosphere of the Precambrian to a PO₂ at 7 mmHg with the first vertebrates (agnaths), to the present sea level PO₂ value of 160 mmHg with the first reptiles.

词形变化

agnaths plural

词源

From Agnatha, from Ancient Greek ἀ- (a-, “without”) + γνάθος (gnáthos, “jaw”).
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