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Definition of syphilophobia in US English:
syphilophobia
(also syphiliphobia)
noun
Medicinehistorical
Irrational or excessive fear of becoming or being infected with syphilis; the delusional belief that one has syphilis; an instance of this.
Origin
Mid 19th century; earliest use found in Robley Dunglison (1798–1869), physician and medical writer. In some forms from French syphiliphobie, with remodelling after words in -phobia.
