Contour line future weather patterns. Isobars are commonly used in television weather reporting. Isallobars are lines joining points of equal pressure change during a specific time interval. These can be divided into "anallobars", lines joining points of equal pressure increase during a specific time interval, and "katallobars", lines joining points of equal pressure decrease. In general, weather systems move along an axis joining high and low isallobaric centers. Isallobaric gradients are important components of the wind as they increase or decrease the geostrophic wind. An isopycnal is a line of constant density. An "isoheight" or "isohypse" is a line of constant geopotential
Pressure point Pressure point A pressure point (Chinese: ; Japanese: "" "vital point, tender spot"; Sinhala: "Nila/Marma Sthana" (in Angampora); Telugu: "Marma Sthanam"; Malayalam: "marmam"; Tamil: "varmam") derives from the meridian points in Traditional Chinese Medicine and Indian Ayurveda and Siddha medicine, and the field of martial arts, and refers to an area on the human body that may produce significant pain or other effects when manipulated in a specific manner. The concept of pressure points spread through the Tamil martial art called Varma kalai, which is a martial art that concentrates on the body's pressure points. The concept of pressure points