Definition of diatreme
: a small generally circular volcanic vent produced by gaseous explosion usually preceded by deep-seated rock fusion by hot gases
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!
Origin and Etymology of diatreme
dia- + Greek trēma hole
Seen and Heard
What made you want to look up diatreme? Please tell us where you read or heard it (including the quote, if possible).