qualia
 
 
The 'what it's like' character of mental states. The way it feels to have mental states such as pain, seeing red, smelling a rose, etc.
 

Details:
 
Plural for quale. "Quale" is a technical term introduced by C.I. Lewis (1929). A quale is an introspectible and seemingly monadic property of a sense-datum. For example, the qualia of a visual sense-datum of a rose would include the experienced red-ness, and the qualia of an olfactory sense-datum of a rose would include the sweet-ness of the scent.
 
 
Chris Eliasmith & P. Mandik