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
The kilogram is the only SI base unit with an SI prefix (kilo, symbol k) as part of its name. It is also the only SI unit that is still directly defined by an artifact rather than a fundamental physical property that can be reproduced in different laboratories.