[1] : The Collaborative International Dictionary of English v.0.48

concentrated \concentrated\ adj.
   1. having a high density of the indicated substance; as, a
      narrow thread of concentrated ore.

   note: narrower terms: undiluted vs. diluted
         wordnet 1.5

   2. gathered together or made less diffuse; as, their
      concentrated efforts; his concentrated attention. opposite
      of distributed or diffused.

   note: narrower terms: bunched, bunchy, clustered;
         centered, centred, centralized, focused;
         undivided also see: compact.
         wordnet 1.5

   3. intense; in an extreme degree; -- of mental phenomena; as,
      her concentrated passion held them at bay.
      wordnet 1.5

   4. being the most concentrated solution possible at a given
      temperature; unable to dissolve still more of a substance.
      opposite of dilute or unsaturated.

   note: narrower terms: supersaturated

   syn: saturated.
        wordnet 1.5

   5. reduced to a stronger or more concentrated form; as,
      concentrated sulfuric acid. opposite of diluted.

   syn: condensed.
        wordnet 1.5

   6. characterized by intensity; especially when imposed from
      without; -- of actions; as, concentrated study.

   syn: intensive.
        wordnet 1.5

   7. characterized by mental concentration.

   syn: intent.
        wordnet 1.5 +pjc
see also:
undiluted distributed diffused bunched bunchy clustered 
centered centred centralized focused undivided 
compact dilute unsaturated supersaturated diluted 

[2] : The Collaborative International Dictionary of English v.0.48

bunch \bunch\, v. i. imp.  p. p. bunched; p. pr.  vb. n.
   bunching.
   to swell out into a bunch or protuberance; to be protuberant
   or round.
   1913 webster

         bunching out into a large round knob at one end.
                                                  --woodward.
   1913 webster
see also:
bunched bunching 

[3] : WordNet (r) 2.0

bunched
     adj : occurring close together in bunches or clusters syn: bunchy,
            clustered
see also:
bunchy clustered 

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