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