supplementation

from WordNet (r) 3.0 (2006)

supplementation
    n 1: a quantity added (e.g. to make up for a deficiency) [syn:
         {supplement}, {supplementation}]
    2: the act of supplementing [syn: {supplementation},
       {subjunction}, {subjoining}]

from The Collaborative International Dictionary of English v.0.48

Supplementation \Sup`ple*men*ta"tion\, n.
   The act of supplementing. --C. Kingsley.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

21 Moby Thesaurus words for "supplementation":
      accession, addition, adjunct, adjunction, affixation,
      agglutination, annexation, attachment, augmentation, increase,
      joining, junction, juxtaposition, prefixation, reinforcement,
      suffixation, superaddition, superfetation, superjunction,
      superposition, uniting

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