Related Clues:
- Alpha, beta, ___
- Third letter
- Photograph contrast measure
- ''Peanuts'' kid
- Chaplin or Sheen
- Saxophonist Parker
- Third letter of the Greek alphabet
- Letter after beta
- With 37 Across, fission emission
- Third Greek letter
- Greek character
- Third caste in "Brave New World"
- ___ radiation
- Dangerous ray
- Unit of magnetic field strength