Pyrometer :: Pyrometer (n.) An instrument used for measuring the expansion of solid bodies by heat.
Pyrometer :: Pyrometer (n.) An instrument for measuring degrees of heat above those indicated by the mercurial thermometer.
Pyrometrical :: Pyrometrical (a.) Pertaining to, or obtained by, the pyrometer; as, pyrometrical instruments; pyrometrical measurements..
Pyrometry :: Pyrometry (n.) The art of measuring degrees of heat, or the expansion of bodies by heat..