ọ̄ character /ɔ̄/ spelling unconfirmed
Ọ̄ (uppercase)
Definitions
  1. The letter ⟨ọ⟩ with mid tone (not usually marked overtly) Nigerialetteruncommon
Source: Wiktionary, where this word is spelled “ọ̄”. Reference: en-ọ̄-yo-character-vePzwVUu