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English noun: Nb

1. Nb (substance) a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium


Synonymsatomic number 41, niobium


Broader (hypernym)metal, metallic element


Narrower (hyponym)columbium


Substance meronymcolumbite, niobite

2. NB (communication) a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something


SamplesThe margins of his book were generously supplied with pencilled NBs.


SynonymsN.B., nota bene


Broader (hypernym)annotation, notation, note









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