Related Clues:

• Letter after theta
• Itty bit
• Teensy amount
• Small speck
• Minimal bit
• Very small quantity
• Greek 'I'
• Greek "i"
• Ninth in a series
• Kappa's preceder
• Inconsequential amount
• It's next to nothing
• Minute particle
• Grain
• Jot or tittle, e.g.