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Pronunciation varies by accent · noun
A roughly spherical, nodule-like geological structure, similar to a geode, that is formed within a rhyolitic lava flow..
Use thunder egg when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Thunder egg means A roughly spherical, nodule-like geological structure, similar to a geode, that is formed within a rhyolitic lava flow..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use thunder egg where its definition matches the intended context.
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