Wordnet 3.0
NOUN (1)
1.
a fluid agent (gas or liquid) that produces cooling;
especially one used to cool a system by transferring heat away from one part to another;
- Example: "he added more coolant to the car's radiator"- Example: "the atomic reactor used a gas coolant"- Example: "lathe operators use an emulsion of oil and water as a coolant for the cutting tool"
The Collaborative International Dictionary of English v.0.48:
coolant \coolant\ n.
a fluid (gas or liquid) used to cool a device by transferring
heat away from one part to another.
[WordNet 1.5]
WordNet (r) 3.0 (2006):
coolant
n 1: a fluid agent (gas or liquid) that produces cooling;
especially one used to cool a system by transferring heat
away from one part to another; "he added more coolant to
the car's radiator"; "the atomic reactor used a gas
coolant"; "lathe operators use an emulsion of oil and water
as a coolant for the cutting tool"