isogram

[ ahy-suh-gram ]
/ ˈaɪ səˌgræm /

noun Meteorology, Geography.

a line representing equality with respect to a given variable, used to relate points on maps, charts, etc.
Also called isoline.

Origin of isogram

First recorded in 1885–90; iso- + -gram1

British Dictionary definitions for isogram

isogram
/ (ˈaɪsəʊˌɡræm) /

noun

another name for isopleth

Scientific definitions for isogram

isogram
[ īsə-grăm′ ]

See isoline.