The Collaborative International Dictionary of English v.0.48:

Agglomerate \Ag*glom"er*ate\, v. t. [imp. & p. p.
   Agglomerated; p. pr. & vb. n. Agglomerating.] [L.
   agglomeratus, p. p. of agglomerare; ad + glomerare to form
   into a ball. See Glomerate.]
   To wind or collect into a ball; hence, to gather into a mass
   or anything like a mass.
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         Where he builds the agglomerated pile.   --Cowper.
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The Collaborative International Dictionary of English v.0.48:

Agglomerate \Ag*glom"er*ate\, v. i.
   To collect in a mass.
   [1913 Webster] Agglomerate

The Collaborative International Dictionary of English v.0.48:

Agglomerate \Ag*glom"er*ate\, Agglomerated \Ag*glom"er*a`ted\,
   a.
   1. Collected into a ball, heap, or mass.
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   2. (Bot.) Collected into a rounded head of flowers.
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The Collaborative International Dictionary of English v.0.48:

Agglomerate \Ag*glom"er*ate\, n.
   1. A collection or mass.
      [1913 Webster]

   2. (Geol.) A mass of angular volcanic fragments united by
      heat; -- distinguished from conglomerate.
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WordNet (r) 3.0 (2006):

agglomerate
    adj 1: clustered together but not coherent; "an agglomerated
           flower head" [syn: agglomerate, agglomerated,
           agglomerative, clustered]
    n 1: volcanic rock consisting of large fragments fused together
    2: a collection of objects laid on top of each other [syn:
       pile, heap, mound, agglomerate, cumulation,
       cumulus]
    v 1: form into one cluster