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/ˌkɒmɪˈtɛəɹi.əm/ · noun
(astronomy) An instrument intended to represent the revolution of a comet around the Sun..
we have their [comets'] path marked in cometariums formed on the imaginary law of attraction
Use cometarium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Cometarium means (astronomy) An instrument intended to represent the revolution of a comet around the Sun..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
we have their [comets'] path marked in cometariums formed on the imaginary law of attraction
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