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]