n. [ Gr. &unr_; weight + thermograph. ] An instrument for recording both pressure and temperature, as of the atmosphere. [ Webster 1913 Suppl. ]
n. [ Gr.
n. [ Thermo- + -graph. ] (Physics) An instrument for automatically recording indications of the variation of temperature. [ 1913 Webster ]
n. [ Thermo- + -graphy. ] Any process of writing involving the use of heat. [ Webster 1913 Suppl. ]