Isotherm: On weather maps, a line joining places along which the temperature of the air is the same; on oceanic maps, a line of equal water temperature. The word was introduced and first used in 1817 ...
“Iso” is a common prefix in meteorology that means lines of an equal value. An isotherm represents lines of equal temperature. Isodrosotherms are lines of equal dew point temperatures. Dew Points tell ...