“Greek letter that looks like an "O" superimposed with an "I"” crossword clue

Reveal the answer to see why it works and where this clue has appeared before.PHI is the answer to the New York Times crossword clue “Greek letter that looks like an "O" superimposed with an "I"”. It was last seen in the puzzle of May 5, 2026, where it runs at 5 Down and fills 3 squares. It crosses 3 other entries in that grid — those are listed below and are the quickest way to confirm the letters you already have.