‖ porosisPhysiol.|pɒˈrəʊsɪs| [mod.L., a. Gr. πώρωσις in same sense, f. πωροῦν to form a callus, f. πῶρος pore n.2] The formation of a callus, as in a fractured bone. 1693tr.Blancard's Phys.Dict. (ed. 2), Porosis, the breeding of callous Matter.1706in Phillips.1858in Mayne Expos.Lex.