Definition of rhotacization in English:

rhotacization

noun

Linguistics
  • 1Change of an original s or z to r, as in was and were.

    1. 1.1Phonetics Pronunciation of a vowel to reflect a following r in the orthography, e.g., in farm, bird.

Origin

1970s: from rhotacize (from Greek rhōtakizein) + -ation.

Pronunciation:

rhotacization

/ˌrōdəsəˈzāSH(ə)n/