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Pronunciation varies by accent · noun
(obsolete) An arrangement of hinged mirrors for the production of multiple images of an object..
Use polygonoscope when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Polygonoscope means (obsolete) An arrangement of hinged mirrors for the production of multiple images of an object..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use polygonoscope where its definition matches the intended context.
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