inclurons
Inclurons are a hypothetical class of particles theorized in some extensions of the Standard Model of particle physics. The concept of inclurons arises from attempts to reconcile certain cosmological observations with existing theoretical frameworks, particularly in the realm of dark matter. While not a standard term in mainstream physics, the idea explores the possibility of particles that interact with ordinary matter in a very subtle, perhaps indirect, way, thus remaining "included" within gravitational potentials without significant electromagnetic or strong nuclear force interactions.
The hypothetical properties of inclurons would be such that they could contribute to the overall mass density