Definition of neutral flame
: a flame resulting from the burning of gases supplied in the proper proportions for perfect combustion (as approximately equal volumes of acetylene and oxygen)
Start your free trial today and get unlimited access to America's largest dictionary, with:
- More than 250,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Seen and Heard
What made you want to look up neutral flame? Please tell us where you read or heard it (including the quote, if possible).