noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A mechanism that regulates the amount of water in a boiler.
2. 2
   A muscle tissue, composed mostly of water, that maintains a constant volume during contraction.

Etymology

From hydro- + -stat.

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