The Collaborative International Dictionary of English v.0.48:
Apparentness \Ap*par"ent*ness\, n. Plainness to the eye or the mind; visibleness; obviousness. [R.] --Sherwood. [1913 Webster]WordNet (r) 3.0 (2006):
apparentness n 1: the property of being apparent [syn: apparentness, apparency]