U+1FAC "ᾬ" Greek Capital Letter Omega with Psili and Oxia and Prosgegrammeni Unicode Character

U+1FAC "ᾬ" Greek Capital Letter Omega with Psili and Oxia and Prosgegrammeni is a historic polytonic Greek letter used in ancient and liturgical Greek orthography to represent a long omega sound. It is composed of three diacritical marks: the psili (a smooth breathing mark, indicating the absence of an initial /h/ sound), the oxia (an acute accent, indicating a high pitch or stressed syllable), and the prosgegrammeni (a small iota subscript written beside the capital letter, representing a long iota sound that was historically pronounced but later lost). This character is part of the Greek Extended Unicode block and is typically employed in scholarly editions of classical texts or ecclesiastical writings, where precise accentuation and breathing are required for phonetic and grammatical clarity.