The Collaborative International Dictionary of English v.0.48:

Titration \Ti*tra"tion\, n. (Chem.)
   The act or process of titrating; a substance obtained by
   titrating.
   [1913 Webster]

WordNet (r) 3.0 (2006):

titration
    n 1: a measured amount of a solution of unknown concentration is
         added to a known volume of a second solution until the
         reaction between them is just complete; the concentration
         of the unknown solution (the titer) can then be calculated