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Alternative clues for the word psec

• One 60-trillionth of a min.
• Infinitesimal division of a min
• 1/60 of a trillionth of a min.
• Teeny fraction of a min
• Tiny time meas
• Infinitesimal fraction of a min
• Time it takes light to travel .3 mm: Abbr
• Time unit for studying the speed of light: Abbr
• Very brief time, briefly