What is conversion of the cell walls into cork tissue by development of suberin; -- commonly taking place in exposed tissues, as when a callus forms over a wound. Suberized cell walls are impervious to water called?

suberization — Conversion of the cell walls into cork tissue by development of suberin; -- commonly taking place in exposed tissues, as when a callus forms over a wound. Suberized cell walls are impervious to water. (Webster's 1913.)