noun
: the unpronounced iota of a Greek improper diphthong when written on the line after the long vowel — used in standard printing practice only when the long vowel is a capital
noun
: the unpronounced iota of a Greek improper diphthong when written on the line after the long vowel — used in standard printing practice only when the long vowel is a capital
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012