This Alphabet song in our Let’s Learn About the Alphabet Series is all about the vowel O Your children will be engaged in singing, listening and following along as they’ll learn to: identify the. This super-catchy and clear alphabet song also lets children hear the letter O sound and see each letter at the beginning of five simple words paired with colorful kid-friend images. What do these words share in common? Children will learn that they begin with the letter O. O (minuscule: o) is the fifteenth letter and the fourth vowel letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. O, the fourth vowel of the modern alphabet, corresponding to the Semitic ayin, which represented a breathing and not a vowel. The Semitic form may have derived from an earlier sign representing an eye. Meanings for Letter O On calendars, O sometimes means the month October. In chemistry, O represents the symbol oxygen. In medicine, O is one of the human blood types. Sometimes when saying decimals, O is another word for 0. Two buoys float in the ocean. One has the letter o on it and the other has the letter h. Hhh. Ah. A wave pushes letters along and they land on the matching buoy. Outstanding! Yahoo! Two seals splash around and smile. Ah. Goodbye. The seals swim away. The letter O is the fifteenth letter in the English alphabet and is classified as a vowel. It has two primary sounds: the long O sound, which is like the /O/ in open, and the short O sound, which is like the /o/ in octopus. Ó (minuscule: ó), known as O-acute, is a Latin-script character composed of the letter O and an acute accent. It is found in the Czech, Dobrujan Tatar, Emilian-Romagnol, Faroese, Hungarian, Icelandic, Kashubian, Polish, Slovak, Karakalpak, and Sorbian languages. The O with accent is a commonly used character in many languages, including Spanish, Portuguese, French, German, and Italian. Accents placed on the letter O —such as Ó, Ò, Ô, Õ, Ö —change pronunciation, meaning, or grammatical emphasis.