Related Clues:

• Bit of nuclear physics
• Puny parasite
• Insignificant amount
• Harness strap
• Supercollider projectile
• Itsy-bitsy biter
• Light line
• Sometimes it gets smashed
• Proton's place
• Cyclotron bit
• Teeny bit
• Source of nuclear energy
• Nuclear energy source
• Smallest amount
• Smallest bit