noun Date: circa 1911 a line representing changes of pressure or temperature under conditions of constant volume, a line (as a contour line) drawn on a map and indicating a true constant value throughout its extent
ISOMETRIC LINE
Meaning of ISOMETRIC LINE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012