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Pronunciation varies by accent · adjective
(chemistry) of, related to, or derived from arsenic, especially in an oxidation state of three; arsenious.
Use arsenous when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Arsenous means (chemistry) of, related to, or derived from arsenic, especially in an oxidation state of three; arsenious.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use arsenous where its definition matches the intended context.
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