Cork Quality Terrentas/Barrentas cork quality Terrentas/Barrentas A loose, pulverulent tissue with rounded cells that leave empty spaces between them, whose walls do not always overlap, filling the lenticular channels. It occurs mainly in corks with a special type of porosity in which the pores have a longitudinally conical profile. When this defect manifests itself frequently, the cork is called terrenta or muddy, and in the most severe cases it disables the production of natural cork works. scale_of attribute method_of entity acronym variable_of