Synonyms of n.b
- 1. niobium, Nb, atomic number 41, metallic element, metal
- usage: a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
- 2. nota bene, NB, N.B., note, annotation, notation
- usage: 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"
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