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3. Infinitesimal division of a min.

Alternative clues for the word psec

• Time it takes for light to travel .3 mm
• Time unit for studying the speed of light: Abbr
• One 60-trillionth of a min.
• Infinitesimal fraction of a min
• Teeny fraction of a min
• Minute part of a minute, for short
• Teeny-tiny time unit (abbr.)
• Very brief time, briefly
• Very brief time