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 measurement system based on units of tens. The prefix of the word indicates how many units the measurement represents. For example, deci equals one-tenth, deca equals 10, centi equals 100 and milli equals 1,000.