Related Clues:

• Tiny particle: Abbr.
• Gangster's gal
• Elem. unit
• Chem. unit
• Cluster of atoms (Abbr.)
• Collection of atoms: Abbr.
• Actress Gretchen
• Unit of matter: Abbr.
• Group of atoms, briefly
• Small particle: Abbr.
• Compound unit: Abbr.
• Small matter: Abbr.
• 40-Down, e.g.: Abbr.
• Group of atoms: Abbr.
• Grp. of atoms