nugget

from WordNet (r) 3.0 (2006)
nugget
    n 1: a solid lump of a precious metal (especially gold) as found
         in the earth
    
from The Collaborative International Dictionary of English v.0.48
Nugget \Nug"get\, n. [Earlier niggot, prob. for nigot, an ingot.
   See {Ingot}.]
   1. A lump; a mass, esp. a native lump of a precious metal;
      as, a nugget of gold.
      [1913 Webster]

   2. Something of value, usually found among many other less
      valuable things; -- often used figuratively; as, a nugget
      of useful information in a sea of data.
      [PJC]
    
from Moby Thesaurus II by Grady Ward, 1.0
27 Moby Thesaurus words for "nugget":
      bar, batch, block, bulk, bullion, chunk, clod, clump, coin gold,
      coin silver, copper, gob, gold, gold nugget, hunch, hunk, ingot,
      loaf, lump, mass, nickel, pat, precious metals, quantity, silver,
      wad, yellow stuff

    

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