U+016A "Ū" Latin Capital Letter U with Macron Unicode Character

U+016A "Ū" Latin Capital Letter U with Macron is a grapheme that represents the letter U with a macron, a horizontal diacritical mark placed above it, used to indicate a long vowel sound in languages such as Latvian, Māori, and Hawaiian. It is part of the Latin Extended-A block and is commonly employed in transliterations of languages like Japanese romanization, where it marks a prolonged "u" sound, as well as in academic writing for ancient languages like Latin to denote vowel length. This character is distinct from a plain U and is essential for proper spelling and pronunciation in over twenty writing systems worldwide, ensuring accurate representation of phonetic distinctions.