(a.) Capable of being perceived; cognizable; discernible\; perceivable.

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