isopleth

noun

iso·​pleth ˈī-sə-ˌpleth 

1

: an isoline on a graph showing the occurrence or frequency of a phenomenon as a function of two variables

2

: a line on a map connecting points at which a given variable has a specified constant value

isoplethic

ˌī-sə-ˈple-thik 

adjective

Word History

Etymology

borrowed from German isoplethe "isoplethic," borrowed from Greek isoplēthḗs "equal in number," from iso- iso- + -plēthēs, adjective derivative of plêthos "great number, mass," from plēth-, base of plḗthein "to be full" — more at plethora

Note: The term was introduced by the German geodesist and professor Christian August Vogler (1841-1925) in Anleitung zum Entwerfen graphischer Tafeln (Berlin, 1877), p. 7.

First Known Use

1908, in the meaning defined at sense 1

Rhymes for isopleth

• shibboleth
• beth
• breath
• death
• heth
• lethe
• meth
• seth
• sheth
• sneath