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n. A device that plots on a graph the measurements of a temperature over time.

n. An instrument for recording graphically the variations of temperature, or the indications of a thermometer.

n. A self-registering thermometer, especially one which registers the maximum or minimum temperature during long periods. Also thermetrograph.

n. a thermometer that records temperature variations on a graph as a function of time

"To end our review of the scientific apparatus at the exhibition we shall merely mention Mr. Van Rysselberghe's registering thermometrograph (shown in Figs. 13 and 14), and shall then say a few words concerning two types of registering apparatus -- Mr. Harlacher's water-current register and Prof. Von Beetz's chronograph."

thermometer