A nundinal letter.

Of or pertaining to a nundine

plural of nundinal

A market or fair held every eight days, particularly (historical) in Roman contexts. / (obsolete) Any recurring eight-day period; an eight-day 'week'.

plural of nundination

(obsolete) Traffic at fairs; buying and selling.

plural of nundine / Alternative form of nundine.

In Ancient Rome, one of the first eight letters of the alphabet, which were repeated successively from the first to the last day of the year. One of these always expressed the market day, which returned every nine days (every eight days by our reckoning).

plural of nundinal letter