Chronometric particles were the constituent components of an energy form with temporal properties.

In 2373, a Borg sphere generated a temporal vortex to the year 2063 through the controlled emission of chronometric particles. Having followed the sphere back in time, the crew of the Enterprise-E was able to recreate the vortex to return to their own time by reconfiguring their warp field to match the chronometric readings of the sphere. (Star Trek: First Contact)

See also

• Chroniton
• Temporal energy
• Temporal radiation