The Collaborative International Dictionary
Readableness
Readable \Read"a*ble\ (r[=e]d"[.a]*b'l), a. Such as can be read; legible; fit or suitable to be read; worth reading; interesting. -- Read"a*ble*ness, n. -- Read"a*bly, adv.
Wiktionary
readableness
n. 1 The property of being capable of being read, legibility. 2 The property of being easy or engaging to read.