Definify.com
Webster 1913 Edition
Nundinary
{
Nun′di-nal
,Nun′di-na-ry
, }Adj.
[L.
nundinalis
, nundinarius
, fr. nundinae
the market day, the weekly market, prop., the ninth day, fr. nundinus
belonging to nine days; novem
nine + dies
day: cf. F. nundinal
.] Of or pertaining to a fair, or to a market day.
Nundinal letter
, among the Romans, 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).