Source: The Collaborative International Dictionary of English v.0.48
Ideation \I`de*a"tion\, n.
The faculty or capacity of the mind for forming ideas; the
exercise of this capacity; the act of the mind by which
objects of sense are apprehended and retained as objects of
thought.
[1913 Webster]
The whole mass of residua which have been accumulated .
. . all enter now into the process of ideation. --J. D.
Morell.
[1913 Webster]