Having very small holes or pores; full of tiny foramina.
Latin foramen (hole) + diminutive -ule + -ous (full of). A variant form emphasizing the diminutive scale of the perforations present in a structure.
Pumice stone—volcanic rock full of air bubbles—is extremely foraminulous, which is why it floats on water after volcanic eruptions and can drift across oceans for years!
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