Related Clues:

• Building block of matter
• Bit that may be split
• Molecule maker
• Fissionable unit
• Something smashable
• Inconsequential amount
• It's next to nothing
• Basic unit
• Director Egoyan
• Physicist's bit
• Minute particle
• Grain
• Jot or tittle, e.g.
• Contrivance
• It's a little matter