(a.) Large enough to be discerned or estimated; capable of being appreciated or estimated; perceptible; as, an appreciable quantity\.

apparent appraisable apprehensible ascertainable assessable calculable clear cognizable comprehensible computable conceivable concrete detectable determinable discernible discoverable distinguishable estimable evident fathomable gaugeable graspable knowable manifest material measurable mensurable meterable noticeable numerable observable obvious palpable perceptible plain ponderable prehensible quantifiable quantizable real recognizable seizable sensible solid substantial substantive tangible understandable weighable