Definition of Mandaeism in US English:

Mandaeism

(also Mandeism, Mandaism)

noun

Christian Church
  • The doctrine or observance of the Mandaeans.

Origin

Late 19th century; earliest use found in Encyclopaedia Britannica. From post-classical Latin Mandaeus + -ism.

Pronunciation

Mandaeism

/manˈdiːɪz(ə)m/