dīˈgamə, ˈdīˌg- noun
Etymology: Latin, from Greek, from di- + gamma; from its resemblance to two capital gammas placed on top of each other
1. : a letter of the original Greek alphabet representing a sound approximately that of English w which early fell into disuse except in writing the western dialects and in numerical notation where it represented the number 6 — called also vau; symbol F, Ϝ
2. : the sound represented by the letter Ϝ