thunder egg


: chalcedony in rounded concretionary nodules

Illustration of thunder egg

Illustration of thunder egg
  • 1 nodule
  • 2 cutaway

Examples of thunder egg in a Sentence

Recent Examples on the Web Our thunder egg, or septarian concretion, which sounds like something a senior citizen would want to get checked out, is only thousands of years old, Hale guessed. Bethany Brookshire, Scientific American, 27 June 2024

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'thunder egg.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1941, in the meaning defined above

Time Traveler
The first known use of thunder egg was in 1941

Dictionary Entries Near thunder egg

Cite this Entry

“Thunder egg.” Dictionary, Merriam-Webster, Accessed 21 Jul. 2024.

Last Updated: - Updated example sentences
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