chiller

Short definition from Wiktionary

Noun

1. 1
   Something that chills: a machine that produces cold air, either for air conditioning, to prepare chilled foods etc.
2. 2
   Something that chills: a heat exchanger between a coolant and a refrigerant, to transfer heat from the coolant loop into the refrigeration system
3. 3
   Something that chills: A machine that removes heat from the working fluid in a refrigeration cycle
4. 4
   A frightening dramatic work, such as a book or film

Adjective

1. 1
   comparative form of chill: more chill