U+031B "̛" Combining Horn Unicode Character

U+031B "̛" Combining Horn is a diacritical mark used in the Latin script to modify a base letter, most prominently in the Vietnamese alphabet where it forms part of the vowels "ơ" and "ư," representing distinct sounds. It is placed above and to the right of the letter, typically following the letter's main stroke, and is classified as a combining mark, meaning it attaches to the preceding character without adding extra spacing. While its primary use is in Vietnamese, it also appears in some transliteration systems and minority language orthographies to denote specific phonetic qualities.