1. 
[syn: sense, sensation, sentience, sentiency, sensory faculty]
The Collaborative International Dictionary of English v.0.48:
Sentience \Sen"ti*ence\, Sentiency \Sen"ti*en*cy\, n. [See
   Sentient, Sentence.]
   The quality or state of being sentient; esp., the quality or
   state of having sensation. --G. H. Lewes.
   [1913 Webster]
         An example of harmonious action between the
         intelligence and the sentiency of the mind. --Earle.
   [1913 Webster]
WordNet (r) 3.0 (2006):
sentiency
    n 1: the faculty through which the external world is
         apprehended; "in the dark he had to depend on touch and on
         his senses of smell and hearing" [syn: sense,
         sensation, sentience, sentiency, sensory faculty]