Definify.com
Webster 1913 Edition
Digamma
Di-gam′ma
,Noun.
[Gr. [GREEK]; [GREEK] = [GREEK] twice +
γάμμα
the letter Γ. So called because it resembled two gammas
placed one above the other.] (Gr. Gram.)
A letter ([GREEK], [GREEK]) of the Greek alphabet, which early fell into disuse.
Webster 1828 Edition
Digamma
DIGAMMA
,Noun.