n.b.   (TTS Sound)

The noun n.b. has 1 sense

• nota bene, NB, N.B. -- (a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something; "the margins of his book were generously supplied with pencilled NBs")

The noun nb has 1 sense

• niobium, Nb, atomic number 41 -- (a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium)