bolometern.
/bəʊˈlɒmɪtə/ An electrical instrument of great sensitiveness for measuring radiant heat.
ΘΚΠ
the world > matter > properties of materials > temperature > heat > [noun] > measurement of heat > instrument > for measuring radiant heat > specific
actinometer1833
pyrheliometer1841
radiograph1880
bolometer1881
1881 Nature 3 Nov. 14/2 An instrument..capable of indicating a change of temperature as minute as 1-100,000th of a single Centigrade degree..is termed by its discoverer, Prof. S. P. Langley, the bolometer, or actinic balance.
1882 Athenæum 2 Sept. 310/1 His ‘bolometer’, or radiation measurer—an instrument some twenty times more sensitive than the thermopile.
Derivatives
bolometric adj. /bɒləʊˈmɛtrɪk/
/bɒləʊˈmɛtrɪk/ΘΚΠ
the world > matter > properties of materials > temperature > heat > [adjective] > relating to measurement of heat > specific
actinometric1842
actinometrical1864
bolometric1881
bolographic1903
1881 C. A. Young Sun 306 Shown by the bolometric measures described above.
This entry has not yet been fully updated (first published 1887; most recently modified version published online September 2018).
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n.1881