Related Clues:

• Source of pep?
• Avoirdupois unit
• Liter fraction
• 28.35 grams avoirdupois
• Troy ___
• See 48 Down
• Weight unit
• Postal unit
• Pound fraction
• One of 16 in a pound
• Fraction of a pound
• Postal-scale marking
• Liquid measurement
• Prevention unit?
• Apothecary inventory item