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ˌbathyˈthermograph
ˌbathyˈthermograph n. 
/ˌbaθᵻˈθəːməɡraf/,
Brit. /ˌbaθᵻˈθəːməɡrɑːf/
, /ˌbaθᵻˈθəːməɡrɑːf//ˌbaθᵻˈθəːməɡraf/U.S. /ˌbæθəˈθərməˌɡræf/
an instrument which records automatically the temperature of water at various depths./ˌbæθəˈθərməˌɡræf/ΘΚΠ
the world > matter > properties of materials > temperature > measurement of temperature > [noun] > instrument > self-registering or recording thermometers
thermometrograph1837
maximum thermometer1852
minimum thermometer1858
thermograph1881
telethermograph1889
bathythermograph1938
1938 A. F. Spilhaus in Jrnl. Marine Res. 1 97 Measurements with the bathythermograph were carried out hourly..and remarkably sudden discontinuities in the thermocline and inversions of the thermocline were revealed.
1938 A. F. Spilhaus in Jrnl. Marine Res. 1 97 The bathythermograph records were traced directly on to this diagram from photographic enlargements of the original traces.
1947 Sci. News 4 84 The bathythermograph..scratches a temperature depth record on a smoked glass slide as it sinks almost vertically on a thin wire running very freely from a small winch.
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