isogram

Mane (Îngilîzî)

1. A word in which no letter of the alphabet occurs more than once.
2. A line on a map or chart, such as a contour line, joining points that have the same value for some quantity.

Hevwate

isarithm

isopleth

isoneph

contour chart

isoline map

constant value line

contour

magnitude contours

isoline

Etîmolojî (Îngilîzî)

From iso- + -gram. The "contour line" sense was proposed in 1889 by Francis Galton.