long i

Noun

 * 1)  the English vowel sound /aɪ/ in the words "fine" and "like", conventionally written $⟨ī⟩$.
 * 2)  a tall variant of the letter i, ꟾ|$⟨ꟾ⟩$, used in all-capital Latin inscriptions and manuscripts in classical antiquity and the Early Middle Ages for a long vowel /iː/. (Other long vowels were marked with apices.)