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Pronunciation varies by accent · noun
Any extinct turtle of the clade †Thalassochelydia.
Use thalassochelydian when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Thalassochelydian means Any extinct turtle of the clade †Thalassochelydia.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use thalassochelydian where its definition matches the intended context.
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