hydrothermal.

Relating to hot water, especially water heated within the earth and involved in geological processes.

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Words that belong together

• hydrothermal vent
• hydrothermal system

On the page

The samples came from a hydrothermal vent beyond the trench.

Usage notes

Primary category: sci-fi. Forms: Normally non-gradable; no ordinary comparative or superlative. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings. Established modern English lexical item. No separate regional spelling or grammatical inflection entry. Commonness: moderately common.