macropore

in catalysis
https://doi.org/10.1351/goldbook.M03672
Pore with width exceeding about 0.05 μm or 50 nm (500 Å).
See:
mesopore (in catalysis)
,
micropore (in catalysis)
Sources:
PAC, 1972, 31, 577. (Manual of Symbols and Terminology for Physicochemical Quantities and Units, Appendix II: Definitions, Terminology and Symbols in Colloid and Surface Chemistry) on page 585 [Terms] [Paper]
PAC, 1976, 46, 71. (Manual of Symbols and Terminology for Physicochemical Quantities and Units - Appendix II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II: Heterogeneous Catalysis) on page 79 [Terms] [Paper]