• Webster's Revised Unabridged Dictionary
    • n Rhotacism 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 to were.
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Century Dictionary and Cyclopedia
    • n rhotacism Too frequent use of r.
    • n rhotacism Erroneous pronunciation of r; utterance of r with vibration of the uvula.
    • n rhotacism Conversion of another sound, as s, into r.
    • n rhotacism Also spelled rotacism.
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Chambers's Twentieth Century Dictionary
    • n Rhotacism rō′ta-sizm erroneous pronunciation of the letter r: burring: the tendency of s to change into r
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Webster's Revised Unabridged Dictionary
Gr. "rwtaki`zein to use the letter rρ) overmuch: cf. F. rhotacisme,


In literature:

Rhotacism, 8, 1; 36, 1.
"New Latin Grammar" by Charles E. Bennett