[["The letter \"I\" is the ninth letter of the English alphabet. Used alone in a sentence, capital \"I\" is a self-referential pronoun. A lower-case \"i\" followed by a period or colon usually stands for the Roman numeral \"one.\"", 72.0], ["The letter I is the ninth letter of the English-language alphabet, used to represent a variety of vowel sounds, including the diphthong used for its name.", 16.0]]
what is the definition of the letter i.
abbreviation