isogram

== English == === Etymology === From iso- +‎ -gram. The "contour line" sense was proposed in 1889 by Francis Galton. === Noun === isogram (plural isograms) A word in which no letter of the alphabet occurs more than once. A line on a map or chart, such as a contour line, joining points that have the same value for some quantity. Synonyms: isoline, isopleth, isarithm ==== Derived terms ==== isogramy === References === === Anagrams === agomirs, agorism