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Pronunciation varies by accent · noun
Any of the superorder †Ichthyopterygia of extinct marine reptiles, superficially resembling dolphins..
Use ichthyopterygian when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Ichthyopterygian means Any of the superorder †Ichthyopterygia of extinct marine reptiles, superficially resembling dolphins..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use ichthyopterygian where its definition matches the intended context.
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