transpicuous

from The Collaborative International Dictionary of English v.0.48

Transpicuous \Tran*spic"u*ous\, a. [L. transpicere to see or
   look through + specere, spicere, to see. Cf. {Conspicuous}.]
   Transparent; pervious to the sight. [R.] "The wide,
   transpicuous air." --Milton.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

50 Moby Thesaurus words for "transpicuous":
      clean-cut, clear, clear as crystal, clear as day, clear-cut,
      coherent, connected, consistent, crisp, crystal, crystal-clear,
      crystalline, defined, definite, diaphane, diaphanous, direct,
      distinct, explicit, express, filmy, gauzy, gossamer, gossamery,
      light-pervious, limpid, loud and clear, lucent, lucid, luminous,
      nonopaque, peekaboo, pellucid, perspicuous, plain, revealing,
      see-through, sheer, simple, straightforward, thin, translucent,
      transparent, unambiguous, unclouded, unconfused, unequivocal,
      univocal, unmistakable, well-defined