BOLOMETER

[bo.lom.e.ter] n [Gk bole stroke, beam of light (fr. ballein to throw) + E -o- + -meter--more at devil] (1881): a very sensitive thermometer whose electrical resistance varies with temperature and which is used in the detection and measurement of feeble thermal radiation and is esp. adapted to the study of infrared spectra -- bo.lo.met.ric adj -- bo.lo.met.ri.cal.ly adv