NB

 Dictionary entry overview: What does NB mean? 

• NB (noun)
  The noun NB has 2 senses:

1. a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium
2. a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something

  Familiarity information: NB used as a noun is rare.

 Dictionary entry details 

• NB (noun)

Meaning:

A soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium

Classified under:

Nouns denoting substances

Synonyms:

atomic number 41; Nb; niobium

Hypernyms ("Nb" is a kind of...):

metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)

Hyponyms (each of the following is a kind of "Nb"):

columbium (a former name for niobium)

Holonyms ("Nb" is a substance of...):

columbite; niobite (a black mineral that is an ore of niobium and tantalum)

Meaning:

A Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something

Classified under:

Nouns denoting communicative processes and contents

Synonyms:

N.B.; nota bene; NB

Context example:

the margins of his book were generously supplied with pencilled NBs

Hypernyms ("NB" is a kind of...):

annotation; notation; note (a comment or instruction (usually added))