U+1F8C "ᾌ" Greek Capital Letter Alpha with Psili and Oxia and Prosgegrammeni Unicode Character

U+1F8C "ᾌ" Greek Capital Letter Alpha with Psili and Oxia and Prosgegrammeni is a precomposed Greek letter used primarily in polytonic orthography for ancient Greek, combining an alpha with three diacritical marks: a smooth breathing mark (psili), an acute accent (oxia), and an iota subscript (prosgegrammeni) written as a small iota beneath the capital letter. This character appears only in uppercase form and represents a specific tonal and breath pattern in classical Greek, such as in words like ᾌδου, the genitive of Hades, where the prosgegrammeni indicates a long vowel or diphthong sound. It belongs to the Greek Extended block of Unicode and is rarely used in modern Greek, but remains important for accurate scholarly transcription and typography of ancient texts.