"Irrational or excessive fear of becoming or being infected with syphilis; the delusional belief that one has syphilis; an instance of this", Mid 19th cent.; earliest use found in Robley Dunglison (1798–1869), physician and medical writer. In some forms from French syphiliphobie, with remodelling after words in -phobia.[syphilophobia etymology, syphilophobia origin, 英语词源]