WordNet (r) 3.0 (2006):

visualisation
    n 1: a mental image that is similar to a visual perception [syn:
         visual image, visualization, visualisation]

The Free On-line Dictionary of Computing (30 December 2018):

visualisation

    Making a visible presentation of numerical data,
   particularly a graphical one.  This might include anything
   from a simple X-Y graph of one dependent variable against one
   independent variable to a virtual reality which allows you
   to fly around the data.

   Gnuplot is the Free Software Foundation's utility for
   producing various kinds of graphs.

   Usenet newsgroup: news:comp.graphics.

   The Computer Graphics Resource Listing contains pointers to
   several visualisation tools.

   comp.graphics FAQ
   (ftp://src.doc.ic.ac.uk/usenet/news-info/comp.graphics/).

   Electronic Visualization Laboratory, University of Illinois
   at Chicago (http://ncsa.uiuc.edu/EVL/docs/Welcome.html).

   (2002-02-21)