One of the 6 primary elements in the Science of Keylonta and one of two types of sub particles that are formed from the Partiki.

A Particum  (an Ultra-Micro Particle) has a base magnetic receiving/drawing energy.

The Particum is a Partiki unit but the Particum Partiki is slower moving and contains half of the electrotonal (which is electrified sound trust or force) of its twin Partiki sub unit. (It pulsates half as fast). They make up the particles in our universe, the sub-atomic units that we know of are composed of Particum-Partiki units.

The other Partiki sub particle are called Partika (PKA) 

(The Amenti Series 1 Classes - DVD 1)

A Partiki sub-units that pulsate the more slowly and appear in conjunction with the Partika, are called Particum and they set the pulsation rhythm through which Partiki units will group to form the particles manifestation within the Unified Fields of the 15-dimensional Matrix.

Together with the Partika they are the energetic substances, through which the base electro-magnetism that keeps the universe and parallel universe in motion is manufactured,

(Voyagers II – Page 453)