nugget - definition and synonyms

noun [countable] 

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/ˈnʌɡɪt/
singularnugget
pluralnuggets
  1. 1
    a rough lump of gold or other metal as it is found in the earth
  2. 3
    a small piece of information or advice that can be useful or important
    nugget of:

    Is there a nugget of truth in his accusation?