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reversing thermometer

noun
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Definition of reversing thermometer

: a thermometer for registering temperature in deep water by means of the breaking of a column of mercury when the thermometer inverts at a specified depth

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“Reversing thermometer.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/reversing%20thermometer. Accessed 13 December 2019.

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