[ id-ee-uh-glos-ee-uh, -glaw-see-uh ]
/ ˌɪd i əˈglɒs i ə, -ˈglɔ si ə /


a private form of speech invented by one child or by children who are in close contact, as twins.
a pathological condition characterized by speech so distorted as to be unintelligible.

Nearby words

  1. idiochromatic,
  2. idiocrasy,
  3. idiocy,
  4. idiodynamic,
  5. idiodynamics,
  6. idiogram,
  7. idiograph,
  8. idiographic,
  9. idioheteroagglutinin,
  10. idioheterolysin

Origin of idioglossia

1890–95; < Greek idióglōss(os) of distinct or peculiar tongue (idio- idio- + -glōssos, adj. derivative of glôssa tongue) + -ia -ia

Related formsid·i·o·glot·tic [id-ee-uh-glot-ik] /ˌɪd i əˈglɒt ɪk/, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for idioglossia


/ (ˌɪdɪəʊˈɡlɒsɪə) /


a private language, as invented by a child or between two children, esp twins
a pathological condition in which a person's speech is so severely distorted that it is unintelligible

Word Origin for idioglossia

C19: from Greek idios private, separate + glossa tongue

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012