Modifier letter right half ring
The modifier letter right half ring is a character found in Unicode in the Spacing [Modifier Letters] range. It is used in romanization to transliterate the Semitic abjad letter aleph and the Arabic letter hamza after it was used by The [Encyclopedia of Islam], representing the sound . In informal contexts, the backtick ⟨⟩ or the apostrophe ⟨⟩ is commonly used as a substitute; but this can lead to confusion with the modifier letter left half ring.