A device that automatically maintains constant pressure, similar to how a thermostat maintains constant temperature.
From Greek 'baros' (pressure) + '-stat' (from 'statos', standing/stationary, meaning a device that maintains a constant state). This term emerged in engineering and scientific instrumentation in the 20th century.
Barostats are the unsung heroes of laboratory work and industrial processes—they keep pressure steady so scientists and engineers can isolate other variables they're studying, making experiments far more reliable.
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