1) Internal sense-datum 
quality or property of something; abstract virtue or quality
(Pl. qualia) (Lat from qualis, of what kind) A quality considered as an independent entity rather than as a quality of a thing. A quale is usually conceded as a universal essence (like redness, sweetness, etc.) but the term may also be applied to individual qualities (this red, this sweet taste). -- L.W.
a quality, as bitterness, regarded as an independent object. · a sense-datum or feeling having a distinctive quality.