Definition of mammatus
: of, relating to, or being a cloud whose lower surface is in the form of pouches
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 mammatus
New Latin, from Latin, of the breast
Seen and Heard
What made you want to look up mammatus? Please tell us where you read or heard it (including the quote, if possible).