hot pool

English

Noun

hot pool (plural hot pools)

1. (geology) A pool or spring that is heated by subterranean volcanic activity.
   • 1851, William Burke, The Mineral Springs of Virginia, With Remarks on Their Use, the Diseases to which They are Applicable, and in which They are Contra-indicated, Accompanied By A Map Of Routes and Distances, A New Work, page 239:

     The hot pool, or boiler, as it is usually termed, (106° Fahrenheit,) is the most easterly in the range.