Hypertension, or high blood pressure, is a condition in which blood-pressure at rest is higher than the body's needs. Because hypertension lacks overt symptoms, high blood pressure can go unnoticed for years.
2. metric-a decimal unit of measurement of the metric system (based on meters and kilograms and seconds); convert all the measurements to metric units; it is easier to work in metric. metric unit.
On the other hand, metric system is the system that recognizes meter as the basic unit of length, kilogram as the basic unit of weight and second as the unit of second. Imperial system was first introduced in 1824, and it was later refined in 1959 and accepted by the British Commonwealth.