Definition of nundinal letter
: one of the first eight letters of the alphabet used by the ancient Romans in the Sabine calendar after adoption of the seven-day week, the first seven letters being repeated consecutively in one column to designate days of the week and all eight in a parallel column to mark the recurrence of market days under an older eight-day cycle
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 nundinal letter? Please tell us where you read or heard it (including the quote, if possible).