What is the term for a line that connects points of equal total rainfall?

The term for a line that connects points of equal total rainfall is "Isohyet." Isohyets are a crucial component in climatology and meteorology because they visually represent areas of similar precipitation levels on a map. By connecting these points, climatologists can analyze and interpret patterns of rainfall, which is important for various applications such as agriculture, water resource management, and understanding climate trends.

The other terms in the list refer to different concepts. Isotherm refers to lines connecting points of equal temperature, isosceles pertains to a type of triangle with specific properties, and isobar indicates lines of equal atmospheric pressure. Each of these plays a significant role in their respective fields of study but does not relate to rainfall measurements.