U+0374 "ʹ" Greek Numeral Sign Unicode Character

U+0374 "ʹ" Greek Numeral Sign is a typographic mark used in ancient and modern Greek to indicate that a letter or sequence of letters is being employed as a numeral, functioning similarly to an apostrophe in modern English but placed above the line or after the final letter. It appears primarily with Greek letters, such as in the notation for numbers like αʹ (1) or κʹ (20), distinguishing numeric values from ordinary text. Although it resembles the Greek tonos or the Latin apostrophe, it has a distinct Unicode definition and is not interchangeable with those characters, preserving its specific historical and mathematical role in Greek writing systems.