calorific
/kæləˈrɪfɪk/Definitions
1. adjective
relating to or producing heat; having a high heat content
“The calorific value of the food was high, so it was not suitable for a low-calorie diet.”
2. noun
a unit of heat energy, especially in the context of food or fuel
“The calorific content of the coal was measured in kilocalories per kilogram.”