Definition of protagon
: a white crystalline powder consisting of a mixture of lipides obtained from the brain
Join MWU now and get access to America’s largest dictionary, with:
- 300,000 words that aren't in our free dictionary
- Expanded definitions, etymologies, and usage notes
- Advanced search features
- Ad free!
Origin and Etymology of protagon
German, from prot- + Greek agōn gathering, assembly
Seen and Heard
What made you want to look up protagon? Please tell us where you read or heard it (including the quote, if possible).