legibility

Etymology

noun

1. The property of being legible or easily readable.
   The legibility of this text is questionable: half the people asked said it was almost illegible, but the other half said it was easy to read.
   The legibility of a type-face is very largely dependent on the absence of similarity between those characters of pairs or triplets which are the most easily mistaken for one another. 1922, Lucien Alphonse Legros, A Note on the Legibility of Printed Matter