Placoderm

adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 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."

  2. 2
    fish-like vertebrate with bony plates on head and upper body; dominant in seas and rivers during the Devonian; considered the earliest vertebrate with jaws wordnet
Adjective
  1. 1
    Pertaining to the paraphyletic class Placodermi.

    "Research published recently on placoderm fish fossils from Scottish Devonian lakes (around 365 myo) found evidence for how this extinct group of animals copulated."

Synonyms

All synonyms
armored fishgnathostomejawed fish

Example

More examples

"Out to sea are placoderms – heavily armoured fish, some of them more than six metres (twenty feet) long and equipped with massive, powerful jaws."

Etymology

From placo- + -derm, after German Placoderm.

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