perfusion stationary phase (material)

in liquid chromatography
https://doi.org/10.1351/goldbook.PT06921
Stationary phase in which the mobile phase primarily travels through the pores of the stationary phase.
Source:
PAC, 1997, 69, 1475. 'Classification and characterization of stationary phases for liquid chromatography: Part I. Descriptive terminology (IUPAC Recommendations 1997)' on page 1479 (https://doi.org/10.1351/pac199769071475)