From The Collaborative International Dictionary of English v.0.48 :
bomb calorimeter \bomb" cal`o*rim"e*ter\, n. a type of calorimeter made of a steel body which closes tightly and resists high pressure, designed for measuring the amount of heat developed durng chemical combustion of a quantity of combustible material in an oxygen atmosphere. [PJC]From WordNet (r) 3.0 (2006) :
bomb calorimeter n 1: strong sealed vessel for measuring heat of combustion [syn: bomb calorimeter, bomb]