U+1FDB "Ί" Greek Capital Letter Iota with Oxia Unicode Character

U+1FDB "Ί" Greek Capital Letter Iota with Oxia is a historic polytonic Greek letter used in classical and liturgical texts to represent a capital iota with an acute accent or oxia, indicating a high pitch or stressed syllable as prescribed by Ancient Greek accentuation rules. It appears within the Unicode block for Greek Extended characters, which supports the encoding of ancient and medieval Greek scripts alongside breathings and other diacritical marks. While modern Greek has largely replaced the oxia with the monotonic tonos accent, this character remains essential for scholarly editions of Homeric poetry, Byzantine hymns, and critical editions of biblical manuscripts to preserve precise orthographic and prosodic details.