U+1F50 "ὐ" Greek Small Letter Upsilon with Psili Unicode Character

U+1F50 "ὐ" Greek Small Letter Upsilon with Psili is a polytonic Greek letter consisting of an upsilon combined with a psili, or smooth breathing mark, which appears as a small curved diacritic above the letter and indicates that the vowel is pronounced without an initial "h" sound in Ancient Greek. This character is part of the Unicode block for Greek Extended, which encodes precomposed forms of Greek letters with various diacritical marks used in classical and liturgical texts. In practice, it is employed in scholarly editions of Ancient Greek writings to accurately represent the original orthography, particularly in words where an initial vowel or diphthong required a smooth breathing to denote a lack of aspiration.