Related Clues:
- Greek letters
- Fraternity letters
- Sorority letters
- Telepathy and clairvoyance, e.g.
- Frat letters
- Trident-shaped symbols
- They're painted on some frat houses
- They're trident-shaped
- Penultimate letters
- Greek consonants
- Fraternity characters
- Trident-shaped letters
- They're pitchfork-shaped
- Greek letters shaped like pitchforks
- Particle flux density symbols