<b>The Particulate Medium (PM) Model as the Basis for Macroscopic Gravitation</b>

This brief presents the Particulate Medium (PM) Model as a structured framework for macroscopic gravitation, proposing that gravitational effects emerge from energy-density interactions within an omnipresent particulate medium rather than mass-based attraction or spacetime curvature. Observational evidence from weak lensing in plasma-rich environments, gravitational wave behavior, and planetary motion is analyzed to support the PM model. A torsion balance experiment is proposed to test whether gravitational attraction depends on material coherence rather than intrinsic mass, providing a direct falsification test for mass-based gravity models. The PM model offers a pathway to quantizing gravity by treating it as a particulate energy process rather than a continuous curvature effect.