di·gam·ma | \ dīˈgamə, ˈdīˌg-\
Definition of digamma
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
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to mark by some ceremony or observation
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