Other forms: blowtorches
A blowtorch is a tool that makes a small very hot flame. Use a blowtorch, a plumber's blowtorch, blowtorch the sugar.
The flame is hot enough to melt solder and to caramelise sugar, which is why it belongs to both plumbers and pastry cooks. The blue inner cone is the hottest part, and that is where the work goes. Americans often say blowtorch where the British say blowlamp.
1nounblowtorchA tool that makes a small very hot flame.
“The plumber used a blowtorch to join the copper pipes.”
blowtorch is a tool.
Blow plus torch, from the way air is blown through the flame to raise its temperature.
From blow + torch.
Etymology from Wiktionary, CC BY-SA