— rhotacistic , adj.
/roh"teuh siz'euhm/ , n.
1. Historical Ling. a change of a speech sound, esp. /s/ , to /r/ , as in the change from Old Latin lases to Latin lares.
2. excessive use of the sound /r/ , its misarticulation, or the substitution of another sound for it.
[ 1825-35; rhô RHO + (IO)TACISM ]