1. Line of equal temperatures.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• southerm,
• isothermic,
• isogrem,
• usotherm,
• jsotherm,
• ksotherm,
• osotherm,
• 9sotherm,
• 8sotherm,
• iaotherm,
• izotherm,
• isother,
• isotharm,
• iso therm,
• Isogheim,
• isotherre,
• isotheer,
• isochel,
• isocheal,
• Isochoelm

• ishtar,
• isothermal,
• isothermic,
• istre,
• isthmi.

The adjective form of the word "isotherm" is "isothermal".

The plural of the "isotherm" can be the "isotherms".

The singular of the "isotherm" can be the "isotherm".