The Collaborative International Dictionary of English v.0.48:

Evocation \Ev`o*ca"tion\, n. [L. evocatio: cf. F. ['e]vocation.]
   The act of calling out or forth. --Sir. T. Browne.
   [1913 Webster]

         The evocation of that better spirit.     --M. Arnold.
   [1913 Webster]

WordNet (r) 3.0 (2006):

evocation
    n 1: imaginative re-creation
    2: calling up supposed supernatural forces by spells and
       incantations [syn: evocation, summoning]
    3: stimulation that calls up (draws forth) a particular class of
       behaviors; "the elicitation of his testimony was not easy"
       [syn: evocation, induction, elicitation]