noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A device that automatically responds to changes in temperature of a liquid, typically water in a domestic hot water heating system, by activating a heating or cooling system to maintain the temperature of the liquid at a desired setting.

Etymology

From aqua- + -stat.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.