pre- + cool
precool (third-person singular simple present precools, present participle precooling, simple past and past participle precooled)
- (transitive) To cool in advance.
2008 June 11, Ken Belson, “Records Tumble and Sweaty New Yorkers Grumble as Heat Persists”, in New York Times:
- In some places, the air conditioning was turned up earlier in the day to precool buildings, and then turned down during peak hours.