perceivable

from WordNet (r) 3.0 (2006)

perceivable
    adj 1: capable of being perceived especially by sight or
           hearing; "perceivable through the mist"
    2: capable of being apprehended or understood [syn:
       {apprehensible}, {intelligible}, {graspable}, {perceivable},
       {understandable}]

from The Collaborative International Dictionary of English v.0.48

Perceivable \Per*ceiv"a*ble\, a.
   Capable of being perceived; perceptible. -- {Per*ceiv"a*bly},
   adv.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

55 Moby Thesaurus words for "perceivable":
      apparent, beholdable, clear, clear as crystal, crystal-clear,
      detectable, discernible, disclosed, distinct, evident, explicit,
      exposed, exposed to view, express, hanging out, in evidence,
      in full view, in plain sight, in view, indisputable, indubitable,
      insight, manifest, naked, noticeable, observable, obvious, open,
      open to view, open-and-shut, outcropping, palpable, patent,
      perceptible, perspicuous, plain, plain as day, recognizable,
      revealed, seeable, self-evident, self-explaining, self-explanatory,
      showing, tangible, to be seen, unclouded, unconcealed, undisguised,
      unhidden, unmistakable, viewable, visible, visual, witnessable