ISOTHERM
isotherm
(noun) (meteorology) an isogram connecting points having the same temperature at a given time
Source: WordNet® 3.1
Etymology
Noun
isotherm (plural isotherms)
A line on a graph or chart, such as a weather map, along which all the points have the same temperature.
Anagrams
• Homerist, moithers, shoterim, theorism, thiomers
Source: Wiktionary
I"so*therm, n. Etym: [Iso- + Gr. (Phys. Geog.)
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition