What is the meaning of Digamma?

Letter of the Archaic Greek alphabet: Ϝ, ϝ

Digamma; the obsolete Greek letter Ϝ (lowercase ϝ)

digamma (archaic Greek letter)

digamma

digamma (Greek letter)

digamma (Old Greek letter Ϝ, ϝ)

the semivowel /u̯/

a letter with a shape similar to that of digamma:

  1. the Claudian letter
  2. the Old Italic letter 𐌅
  3. the Latin letter F

the Claudian letter

the Old Italic letter 𐌅

the Latin letter F

digamma

digamma; the Greek letter Ϝ, ϝ

Source: wiktionary.org