thunderegg

English

Alternative forms

• thunder egg

Etymology

From thunder +‎ egg.

Noun

thunderegg (plural thundereggs)

1. A roughly spherical, nodule-like geological structure, similar to a geode, that is formed within a rhyolitic lava flow.

Translations

Translations

• Chinese:

  Mandarin: 雷公蛋石 (léigōng dànshí)

• Danish: please add this translation if you can
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• Finnish: ukkosenmuna
• Portuguese: please add this translation if you can