Meaning of betacism | Babel Free

Definitions

1. A sound change in which [b] (the voiced bilabial plosive) shifts to [v] (the voiced labiodental fricative).
   uncountable, usually
2. A speech disorder involving excessive use of the [b] sound, or conversion of other sounds into it.
   uncountable, usually

Examples

“Betacism is a fairly common phenomenon: it has taken place in Greek, Hebrew, Spanish, and some Portuguese dialects, among others.”

CEFR level