Di*gam"ma (?), n. [Gr. ; = twice + the letter . So called because it resembled two gammas placed one above the other.] 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.