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hydrostat

[hahy-druh-stat]
noun
  1. an electrical device for detecting the presence of water, as from overflow or leakage.
  2. any of various devices for preventing injury to a steam boiler when its water sinks below a certain level.
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Origin of hydrostat

First recorded in 1855–60; hydro-1 + -stat
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for hydrostat

hydrostat

noun
  1. a device that detects the presence of water as a prevention against drying out, overflow, etc, esp one used as a warning in a steam boiler
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012