[1] : The Collaborative International Dictionary of English v.0.48

perceptible \percep"tible\ p~erse^p"ti^b'l, a. l.
   perceptibilis: cf. f. perceptible. see perceive.
   capable of being perceived; cognizable; discernible;
   perceivable; large enough to be perceived; not so small as to
   be incapable of perception.
   1913 webster

         with a perceptible blast of the air.     --bacon.
   1913 webster -- percep"tibleness, n. --
   percep"tibly, adv.
   1913 webster
see also:
perceive percep"tibleness percep"tibly 

[2] : WordNet (r) 2.0

perceptible
     adj 1: capable of being perceived by the mind or senses; "a
            perceptable limp"; "easily perceptible sounds";
            "perceptible changes in behavior" ant: imperceptible
     2: easily perceived by the senses or grasped by the mind; "a
        perceptible sense of expectation in the court"; "an
        obvious or palpable lie" syn: obvious
     3: easily seen or detected; "a detectable note of sarcasm"; "he
        continued after a perceptible pause" syn: detectable
see also:
imperceptible obvious detectable 

[3] : Moby Thesaurus II by Grady Ward, 1.0

84 moby thesaurus words for "perceptible":
   apparent, appraisable, appreciable, apprehensible, ascertainable,
   assessable, beholdable, calculable, clear, clear as crystal,
   cognizable, comprehensible, computable, conceivable, crystal-clear,
   detectable, determinable, discernible, disclosed, discoverable,
   distinct, distinguishable, estimable, evident, explicit, exposed,
   exposed to view, express, fathomable, gaugeable, graspable,
   hanging out, in evidence, in full view, in plain sight, in view,
   indisputable, indubitable, insight, knowable, manifest, measurable,
   mensurable, meterable, naked, notable, noticeable, numerable,
   observable, obvious, open, open to view, open-and-shut,
   outcropping, palpable, patent, perceivable, perspicuous, plain,
   plain as day, prehensible, prominent, quantifiable, quantizable,
   recognizable, revealed, seeable, seizable, self-evident,
   self-explaining, self-explanatory, showing, tangible, to be seen,
   unclouded, unconcealed, understandable, undisguised, unhidden,
   unmistakable, viewable, visible, visual, witnessable

Perceptible >> P Words
Perceptible, definition of term: Perceptible
perceptible_pag1.html