The Collaborative International Dictionary of English v.0.48:

Terminology \Ter`mi*nol"o*gy\, n. [L. terminus term + -logy: cf.
   F. terminologie.]
   1. The doctrine of terms; a theory of terms or appellations;
      a treatise on terms.
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   2. The terms actually used in any business, art, science, or
      the like; nomenclature; technical terms; as, the
      terminology of chemistry.
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            The barbarous effect produced by a German structure
            of sentence, and a terminology altogether new. --De
                                                  Quincey.
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WordNet (r) 3.0 (2006):

terminology
    n 1: a system of words used to name things in a particular
         discipline; "legal terminology"; "biological nomenclature";
         "the language of sociology" [syn: terminology,
         nomenclature, language]