cavernous porosity
1cavern porosity — A pore system having large, cavernous openings. The lower size limit, for field analysis, is practically set at approximately the smallest opening that an adult person may enter …
2opening — I (New American Roget s College Thesaurus) Open space Nouns 1. opening, hole, foramen; aperture, yawning, oscitancy, dehiscence; chasm (see interval); breach. 2. (small opening) puncture, perforation, scuttle; pinhole, keyhole, loophole, porthole …
