The Collaborative International Dictionary
Dianoialogy
Dianoialogy \Di`a*noi*al"o*gy\, n. [Gr. ? thought + -logy.]
The science of the dianoetic faculties, and their operations.
--Sir W. Hamilton.
Wiktionary
dianoialogy
n. (context archaic English) The science of the dianoetic, or intellectual, faculty.