Visiobibliophobia (from Latin visio, "face"; biblio, "book"; and Greek φόβος/φοβία, phobia) is an anxiety disorder that was first described by neuroscientist Justin Moretto. The disease was first outlined in an attempt to properly describe a growing fear of the popular social networking site Facebook, but has since come to include fears of a wide variety of social media platforms such as twitter and foursquare. A less common name for the disease, prosopobibliophobia, is rarely used despite it's proper greek foundation. Prosopobibliophobia has the same meaning and connotation as visiobibliophobia but is less widespread because of it's less familiar greek words:πρόσωπο (face) βιβλίο (book).