orthodontics: dental specialty that using braces, retainers, and other dental devices to treat misalignment of teeth, restoring them to proper functioning. orthodontist: the oral health provider who specializes in diagnosis, prevention, interception, and treatment of malocclusions, or bad bites, of the teeth and surrounding structures.
Define metric system: a decimal system of weights and measures based on the meter and on the kilogram a decimal system of weights and measures based on the meter and on the kilogramâ¦ See the full definition
Weight is the force that mass has because of the gravity. So, if an object has a mass of one pound, then it has the same mass on the moon, but weighs less than earth. In metric system, unit of mass is kilogram. Other common metric mass units are grams, milligrams and tonnes.In imperial and u.s. customary system, common weight units are pound and ounce.o, if an object has a mass of one pound, then it has the same mass on the moon, but weighs less than earth. In metric system, unit of mass is kilogram. Other common metric mass units are grams, milligrams and tonnes. In imperial and u.s.