noun see: full Date: 1908 an isoline on a graph showing the occurrence or frequency of a phenomenon as a function of two variables, a line on a map connecting points at which a given variable has a specified constant value, ~ic adjective
ISOPLETH
Meaning of ISOPLETH in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012