retarc.
A rubble mound occasionally formed by a powerful underground explosion (usually nuclear) in solid rock, due to the chimney of shattered rock above the explosion occupying a greater volume than the solid rock previously present.
Meaning & usage
A rubble mound occasionally formed by a powerful underground explosion (usually nuclear) in solid rock, due to the chimney of shattered rock above the explosion occupying a greater volume than the solid rock previously present.
Where this word comes from
From crater reversed, signifying the formation of an elevated mound rather than the typical sunken crater.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.