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.
The metric system is a decimal-based system of measurement originally based on the meter and kilogram, which were introduced by France in 1799. Decimal-based means all the units are based on powers of 10. In order to convert between units, it's only necessary to multiply or divide by powers of 10.