noun
1. : a line (as a contour line) drawn on a map and indicating a true constant value throughout its extent
2. : a line representing changes of pressure or temperature under conditions of constant volume
noun
1. : a line (as a contour line) drawn on a map and indicating a true constant value throughout its extent
2. : a line representing changes of pressure or temperature under conditions of constant volume
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012