The term olfactism comes from the Latin verb ol(e)facere (to smell). It is used in * synaesthesia research to denote a hallucinated odour which is triggered by a sense perception in a different sensory modality. In accordance with the sensory modality involved, olfactisms are divided into categories such as optical or light olfactism, tactile or touch olfactism, pressure olfactism, kinaes-thetic or movement olfactism, and temperature olfactism. The term olfactism is used in opposition to terms such as * phonism, * photism, and * gustatism.
References
Cytowic, R.E. (2002). Synesthesia. A union of the senses. Second edition. Cambridge, MA: MIT Press.
Stoddart, W.H.B. (1926). Mind and its disorders. Fifth edition. London: H.K. Lewis & Co.
Dictionary of Hallucinations. J.D. Blom. 2010.