Here are the primary isopleths and their definition. Isobar- contour of equal pressure Isohypse- contour of equal geopotential height (a.k.a. height contours) Isotherm- contour of equal temperature Isotach- contour of equal wind speed Isodrosotherm- contour of equal dewpoint Isohyet- contour of equal rainfall Isentrope- contour of equal potential temperature (Theta) Isallobar- contour of equal surface barometric pressure change Isoster- contour of a constant density |