weatherglass
noun
weath·er·glass
ˈwe-t͟hər-ˌglas 
: a simple instrument for showing changes in atmospheric pressure by the changing level of liquid in a spout connected with a closed reservoir
broadly
: barometer
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“Weatherglass.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/weatherglass. Accessed 30 Dec. 2024.
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