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Pronunciation varies by accent · noun
Any extinct aquatic reptile of the superorder Eusauropterygia.
Use eusauropterygian when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Eusauropterygian means Any extinct aquatic reptile of the superorder Eusauropterygia.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use eusauropterygian where its definition matches the intended context.
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