Mispronunciation of "r"

Wiktionary Word definitions in Wiktionary
n. 1 An exaggerated use of the sound of the letter R. 2 (context countable linguistics English): A linguistic phenomenon in which a consonant changes into an R, such as Latin ''flos'' becoming ''florem'' in the accusative case. 3 inability to pronounce ...

Wikipedia Word definitions in Wikipedia
In medical contexts, rhotacism is the inability or difficulty in pronouncing the sound r. Thus, many speech pathologists call this problem de -rhotacization, because the sounds lose their rhotic quality rather than becoming rhotic. The rhotic sounds are ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Rhotacism \Rho"ta*cism\, n. [Gr. "rwtaki`zein to use the letter r ([rho]) overmuch: cf. F. rhotacisme.] An oversounding, or a misuse, of the letter r; specifically (Phylol.), the tendency, exhibited in the Indo-European languages, to change s to r, as wese ...

Douglas Harper's Etymology Dictionary Word definitions in Douglas Harper's Etymology Dictionary
1830, from Modern Latin rhotacismus , from Greek rhotakizein , from rho "the letter -r-," from Hebrew or Phoenician roth . Excessive or peculiar use of the -r- sound (the "burr"), especially the conversion of another sound (usually -s- ) to -r- ; as in ...