Tricyclic input manifold
The tricyclic input manifold was a type of manifold used in the propulsion system aboard  starships.

In 2371, Vice Admiral Patterson commented to Captain Kathryn Janeway that, with taking command of the , she would be the first to test a class 9 warp drive with a tricyclic input manifold in deep space. ()

See also 
Tricyclic plasma drive

fr:Combustion tricyclique
de: Trizyklischer Inputverteiler
Warp