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Meaning : A soft grey ductile metallic element used in alloys. Occurs in niobite. Formerly called columbium.
Synonyms : atomic number 41, niobium
Meaning : A Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something.
Example : The margins of his book were generously supplied with pencilled NBs.
Synonyms : n.b., nota bene
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Nb meaning in Bengali (Bangla).