digamma Meaning, Definition & Usage

Di*gam"ma noun
Etymology
Gr. = twice + the letter . So called because it resembled two gammas placed one above the other.
Definitions
  1. (Gr. Gram.) A letter (, ) of the Greek alphabet, which early fell into disuse. ✍ This form identifies it with the Latin F, though in sound it is said to have been nearer V. It was pronounced, probably, much like the English W.

Webster 1913