What is "o-hook"

O-hook (Ҩ ҩ; italics: Ҩ ҩ) is a letter of the Cyrillic script. In the Unicode text-encoding standard, this letter is called "Abkhasian Ha". Its form bears some similarities to the Greek letter Theta (Θ θ/ϑ). In English, O-hook is commonly romanized using the Latin letter O dot below (Ọ ọ).

O-hook is used in the alphabet of the Abkhaz language where it represents the labial-palatal approximant , the sound of in French . It is placed between O and Π in the alphabet.