Matrix compositor
A matrix compositor was a component of a starship's warp core.

The warp core matrix compositor of the  became fused after being attacked by a booby-trapped Cardassian freighter and three Maquis raiders in 2373, leaving the ship adrift in space. Captain Sisko beamed a damage control team to the Malinche with twelve micro-power relays to assist Captain  with repairs. ()

While giving a tour of  to the Drayans, Captain Kathryn Janeway explained how the ship's "warp core [was] designed to operate for up to three years before refueling." Commander Chakotay then pointed out that "the reaction chamber [was] equipped with a compositor [that allowed] us to re-crystallize the dilithium," adding, "In our situation we can never be sure when we'll be able to find a new supply." ()

See also 
 Beta-matrix compositor
 Theta-matrix compositor

Propulsion technology