U+1D54 "ᵔ" Modifier Letter Small Top Half O Unicode Character

U+1D54 "ᵔ" Modifier Letter Small Top Half O is a typographical symbol classified as a modifier letter, representing the upper half of the letter "o" and used in phonetic transcription to indicate a specific diacritic quality or a reduced articulation of a vowel sound. It is part of the Phonetic Extensions block in Unicode, which includes various characters for linguistic notation. This character is distinct from a full letter, serving instead as a superscript or combining mark to modify the pronunciation of the preceding or following base character.