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).
Noun. 1. metric system-a decimal system of weights and measures based on the meter and the kilogram and the second. system of weights and measures-system of measurement for length and weight and duration. cgs, cgs system-system of measurement based on centimeters and grams and seconds.