Use Retin-A exactly as your doctor has prescribed it for you. Follow all directions on your prescription label. Do not use this medicine in larger or smaller amounts or for longer than recommended. Do not take by mouth. Retin-A is for use only on the skin.
Definition of wall for English Language Learners : a structure of brick, stone, etc., that surrounds an area or separates one area from another : the structure that forms the side of a room or building
Noun. 1. wallboard-a wide flat board used to cover walls or partitions; made from plaster or wood pulp or other materials and used primarily to form the interior walls of houses. dry wall, drywall. beaver board-a light wallboard made of compressed wood pulp.allboard. n. 1. (Building) a thin board made of materials, such as compressed wood fibres or gypsum plaster, between stiff paper, and used to cover walls, partitions, etc. (ËwÉlËbÉrd, -ËboÊrd).