thunderegg

English

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

Etymology

Compound from English thunder + English egg (incite, encourage).

Origin

English

egg

Gloss

incite, encourage

Timeline

Distribution of cognates by language

Geogrpahic distribution of cognates

Cognates and derived terms