rhotacism Meaning, Definition & Usage

Rho"ta*cism noun
Etymology
Gr. "rwtaki`zein to use the letter r (ρ) overmuch: cf. F. rhotacisme.
Definitions
  1. 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.

Webster 1913