isotherm
/ˈaɪ.səʊˌθɜː(ɹ)m/ noun
Forms isotherms
- noun A line on a graph or chart, such as a weather map, along which all the points have the same temperature.
Synonyms
Etymology
From the French isotherme (“of equal temperature”, adjective), itself from Ancient Greek ἴσος (ísos, “equal”) + θέρμη (thérmē, “warmth”). By surface analysis, iso- + -therm.
Webster’s 1913
- noun A line connecting or marking points on the earth's surface having the same temperature. This may be the temperature for a given time of observation, or the mean temperature for a year or other period. Also, a similar line based on the distribution of temperature in the ocean.
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “isotherm”, CC BY-SA 4.0. Details