Kenoaimaton

"Yes, I believe we have the "intellectuals" of the Third Imperium to thank for the... enlightening concept."

- Sith King Sycarion IV

Kenoaimatons were the theoretically intelligent microscopic lifeforms present within the individual cells of "Force-dead" individuals, specifically Voidwalkers. While not hypothesized as to the manner in which they manifested, it was believed that the microscopic organisms prevented the formation, reproduction or nourishing of, thereby causing an individual to become "Force-dead". In addition, kenoaimatons were also though to have served as the catalyst for providing synthesis between living sapients and the cosmic energy field of the Void, thus enables the existence of Voidborn.

Conceptually hypothesized as the antithetical entities that explained both the absence of midi-chlorians in the Voidborn and the source of their connection to the Void, the theory of kenoaimatons originated from a cabal of biologists operating from within the Third Imperium. Following the revelation and battle of the Sky Vault, Xaga Terron believed the idea of kenoaimatons came, either directly or indirectly, from the Imperial Bureau of Force Investigations, who'd been in possession of Voidborn twins up till that point in time.

Behind the scenes
The term "kenoaimaton" comes from an amalgamation of two Greek words; "κενό" (meaning "empty", "vacant" or "void"), and "αίματος" (meaning "blood"), effectively translating loosely as "void blood".

Kenoaimatons were conceived as the antithesis of midi-chlorians, although only from an in-universe perspective as an effort by the  to explain the phenomenon; the existence of kenoaimatons was never, and will never, be established, in order to help keep a degree of mystique and prevent the Void from becoming too technical.