lemmatization

from The Collaborative International Dictionary of English v.0.48

lemmatization \lem`ma*tiz*a"tion\
   (l[e^]m`m[.a]*t[i^]z*[=a]"sh[u^]n), v. t.
   The act or process of lemmatizing; conversion into a
   lemma[2].
   [PJC]

   Note: Lemmatization of search words in a computerized
         Information Retrieval System may allow more effective
         retrieval of documents of interest to the searcher.
         [PJC]