brontide

American

[bron-tahyd] / ˈbrɒn taɪd /

noun

a rumbling noise heard occasionally in some parts of the world, probably caused by seismic activity.

First recorded in 2000–05; from Greek brontḗ “thunder” + -ide (for -id ¹ )

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023