blowdown

noun ! Definition from Wiktionary (CC BY-SA). More about blowdown at Wordnik → Where our words come from →

1. The removal of liquid and solid hydrocarbons from a refinery vessel by the use of pressure.
2. Cooling fluid discharged from a plant at the end of its cycle.
3. Uprooting, overtopping, or bole breakage of trees by the wind; windthrow and windsnap.