WordWeb Online

1. Easily seen or detected
   "he continued after a perceptible pause";
   - detectable
    
2. Capable of being perceived by the mind or senses
   "a perceptible limp"; "easily perceptible sounds"; "perceptible changes in behaviour"; "a perceptible sense of expectation in the court"

See also: audible, detectable, discernible, faint, hearable, noticeable, palpable, perceivable, recognisable [Brit], recognizable, seeable, sensible, visible, weak

Antonym: unperceivable

Encyclopedia: Perceptible