Related Clues:

• Greek I
• Teeniest Greek letter?
• Physicist's subject
• Small matter?
• Letter before kappa
• Small bit
• Bit of nuclear physics
• Abe's babe
• Insignificant amount
• Supercollider projectile
• Little shaver
• Sometimes it gets smashed
• Young fellow
• Proton's place
• Cyclotron bit