Definition of psellism in English:

psellism

noun

Medicine
rare
  • A defect of speech; especially stammering.

Origin

Mid 19th century. From post-classical Latin psellismus from Hellenistic Greek ψελλισμός action or fact of stammering from ancient Greek ψελλίζειν to stammer (from ψελλός (adjective) stammering (of imitative origin, with expressive gemination and a suffix -λό- frequently used to designate infirmities) + -ίζειν) + -ισμός.

Pronunciation

psellism

/ˈ(p)sɛlɪz(ə)m/