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Pronunciation varies by accent · noun
(paleontology) 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.
Research published recently on placoderm fish fossils from Scottish Devonian lakes (around 365 myo) found evidence for how this extinct group of animals copulated.
Use placoderm when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Placoderm means (paleontology) 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..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Out to sea are placoderms – heavily armoured fish, some of them more than six metres (twenty feet) long and equipped with massive, powerful jaws.
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