tartars
Tartar is the buildup of plaque that can form on your teeth and cause cavities. If you become a dentist one day, part of your job will be scraping tartar off people's teeth.
Tartar is a very hard substance, too hard to be brushed off with a toothbrush. It's formed when certain elements in saliva mix with the plaque that commonly occurs on teeth. Another kind of tartar is known as "cream of tartar," and it's a common ingredient in baking, either alone or as an ingredient in baking powder. The Greek root refers to this baking tartar, tartaron, "substance encrusting the sides of wine casks."
Close your vocabulary gaps with personalized learning that focuses on teaching the words you need to know.