Definition of mysophobia in US English:

mysophobia

(also misophobia)

noun

  • Extreme or irrational fear of dirt or contamination.

    ‘a very serious case of mysophobia’

Origin

Late 19th century: from Greek musos ‘uncleanness’ + -phobia.

Pronunciation

mysophobia

/ˌmaɪsəˈfoʊbiə//ˌmīsəˈfōbēə/