Dilithium reactor
The dilithium reactor was a piece of energy technology on the Dauntless-class starships.
In 2384, the dilithium reactor of the USS Dauntless was listed with other rooms, technologies, and systems for engineering in an operations panel on the main bridge. (PRO: "Mindwalk")
In the list, it is implied that the dilithium reactor is not the warp core, as the warp core is listed alongside this reactor. A clear view of the panel was provided by Dominique Rossier of Wardenlight Studio. [1]