Positron

A positron is a subatomic particle, and is an antiparticle of the electron. Positrons belong to a type of particle known as Antileptons, the basis of Antimatter.

The flow rate of positrons is the fourth and final step of a subspace infrared algorithm. (VOY: "Good Shepherd")

During an encounter in 2154 with the Orions, the Enterprise (NX-01) found itself on the receiving end of a towing cable that was deployed from Harrad-Sar's barge. The Enterprise was able to break free after it sent a positron burst through its navigational deflector and along the towing cable, which resulted in the triggering of an energy cascade that successfully disabled the Orion's power systems. (ENT: "Bound")