re·heater | \ (ˈ)rē+ \

Definition of reheater 

: one that reheats: such as

a : a furnaceman who reheats metal

b : a receiver furnished with means for heating the steam in a compound engine or turbine

c : an apparatus for reheating compressed air before use to prevent excessively low temperatures due to expansion

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History and Etymology for reheater

re- + heater

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