Horn (diacritic)
The horn is a diacritic mark attached to the top right corner of the letters o and u in the Vietnamese alphabet to give ơ and ư, unrounded variants of the vowel represented by the basic letter. In Vietnamese, it is rarely considered a separate diacritic; rather, the characters ơ and ư are considered separate from o and u.Encodings
In Unicode, horn is encoded as a combining mark, and precomposed letters.
The Unicode and HTML codes for letters with a horn are:
and
*
