- nonesThe notional first-quarter day of a Roman month, occurring on the 7th day of the four original 31-day months (March, May, Quintilis or July, and October) and on the 5th day of all other months.
- non-Used in the sense of no or none, to show lack of or failure to perform; or in the sense of not, to negate the meaning of the word to which it is prefixed.
- nona-Nine.
- noncupleNine-to-one; (in 1729 quot.) imprecisely, with any number of aliquot parts over.
- nonicDescribing a polynomial that has 9 as the highest exponent of its terms.