Rhotacism definition

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An exaggerated use of the sound of the letter R.
: A linguistic phenomenon in which a consonant changes into an R, such as Latin flos becoming florem in the accusative case.
Inability to pronounce the letter R; derhotacization.
- 1959: Anthony Burgess, Beds in the East, Ch. 2. (The Long Day Wanes, p. 403)
  
  'But I'm hungwy.' A pathetic little-girl's rhotacismus.
- 1970: Leland E. Hinsie and Robert Jean Campbell, Psychiatric Dictionary, page 711 (Oxford University Press)
  
  For example: r’s may become burrs or guttural grunts or w’s or l’s (rhotacism); […]
- 1976: Deafness, Speech, and Hearing Publications, Inc., of Gallaudet College & the American Speech and Hearing Association, DSH Abstracts, volumes 16–17 (1976–1977), page 289 (Deafness Speech and Hearing Publications)
  
  From the analysis of Kana writings, hypothesizes that the inability to establish a stable… […] The correction of rhotacism by means of an electric vibrator.
- 2005: Bernard Fogel, PhD, CCC-SLP, Exercising the Rhotacism in Absence of Pathology (ADVANCE)
  
  It is universally accepted that the rhotacism, a defective utterance of the /r/ sounds, is usually the last and most difficult American English consonant to correct functionally.
  
  I use two methods to help correct the rhotacism.