资料来源 : Webster's Revised Unabridged Dictionary (1913)

Perceiver \Per*ceiv"er\, n.
   One who perceives (in any of the senses of the verb).
   --Milton.

资料来源 : WordNet®

perceiver
     n : a person who becomes aware (of things or events) through the
         senses [syn: {observer}, {beholder}]