isotherm

• POS: Noun
• HYPHEN: i=so=therm

CIDE DICTIONARY

isotherm, n. [Iso- + Gr. heat, fr. hot.].

•  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.  [1913 Webster]
•  A line on a graph connecting points representing states having the same temperature; an isothermal line.  [PJC]

OXFORD DICTIONARY

isotherm, n.
1 a line on a map connecting places having the same temperature at a given time or on average over a given period.
2 a curve for changes in a physical system at a constant temperature.

Derivative

isothermal adj. isothermally adv.

Etymology

F isotherme (as ISO-, Gk therme heat)

THESAURUS

isotherm

air mass, anticyclone, cold front, cold sector, cyclone, front, high, high-pressure area, isobar, isometric, isometric line, isopiestic line, isothermal line, low, low-pressure area, occluded front, polar front, squall line, stationary front, warm front, weather map, wind-shift line