B0375900 (bō-lŏm′ĭ-tər)n. An instrument that measures radiant energy by correlating the radiation-induced change in electrical resistance of a blackened metal foil with the amount of radiation absorbed.[Greek bolē, ray; see gwelə- in Indo-European roots + -meter.]bo′lo·met′ric(bō′lə-mĕt′rĭk) adj.bo′lo·met′ri·cal·ly adv.Thesaurus