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Trident-shaped Greek letter

Looking for the answer to the USA Today Crossword clue “Trident-shaped Greek letter”? The solution is PSI, a 3-letter word. This clue was most recently seen in the June 14, 2026 (Sunday) USA Today Crossword. Tap any date below to open that day's complete puzzle, or search another clue from the bar above.

Answer
PSI

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