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).
The kilometre (International spelling as used by the International Bureau of Weights and Measures; SI symbol: km; / Ë k Éª l É m iË t Ér / or / k Éª Ë l É m Éª t Ér /) or kilometer (American spelling) is a unit of length in the metric system, equal to one thousand metres (kilo-being the SI prefix for 1000).