placoderm

名词 n. 形容词 adj.
中文释义

英文释义

名词 n.
  1. A member of an extinct paraphyletic class (†Placodermi) of jawed fish with armored heads and thoraces; the group lived during the Silurian and Devonian periods.
    — Out to sea are placoderms – heavily armoured fish, some of them more than six metres (twenty feet) long and equipped with massive, powerful jaws.
形容词 adj.
  1. Pertaining to the paraphyletic class †Placodermi. not-comparable
    — Research published recently on placoderm fish fossils from Scottish Devonian lakes (around 365 myo) found evidence for how this extinct group of animals copulated.

词形变化

placoderms plural

词源

词源 1
From placo- + -derm, after German Placoderm.
词源 2
From placo- + -derm, after German Placoderm.
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