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.
metric (Noun). A measurement of the distance between two points in some metric space: it is a real-valued function d(x,y) between points x and y satisfying the following properties: (1) positive definiteness: and, (2) symmetry: , and (3) triangle inequality: . metric (Verb).
Kilometer is a metric length unit and equals to 1000 meters. It is spelled as kilometre in europe. It is a commonly used unit of length in most of the countries to measure the distance between two geographical locations. The abbreviation is km.