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