A provisional callus refers to a temporary protective layer that forms on an injured or damaged area of the skin. This callus acts as a barrier, shielding the wound and promoting healing. However, in certain contexts, one may prefer using various synonyms to describe this phenomenon. Some alternatives for provisional callus include 'temporary protective covering,' 'healing shield,' 'transitional barrier,' or 'ephemeral wound covering.' These synonyms not only provide different ways to express the concept of a provisional callus but also add variety to the description of this temporary defense mechanism that aids in the process of healing.