Betacism

//ˈbiːtəsɪzəm// noun

Definitions

Noun
  1. 1
    A sound change in which [b] (the voiced bilabial plosive) shifts to [v] (the voiced labiodental fricative). uncountable, usually

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

  2. 2
    A speech disorder involving excessive use of the [b] sound, or conversion of other sounds into it. uncountable, usually

Etymology

From beta + -cism (“phenomenon related to a specific phoneme”).

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