The crossword solution for the term 'S on the dinner table' is 'SALT'. SALT is a mineral composed primarily of sodium chloride, a chemical compound belonging to the larger class of salts. It is an essential nutrient for human health and is used as a seasoning in many cuisines around the world. SALT is also used in many industrial processes, such as water treatment and food preservation. It has been used since ancient times to preserve food and enhance flavor.