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brontide

American  
[bron-tahyd] / ˈbrɒn taɪd /

noun

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

Etymology

Origin of brontide

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

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.