isothermPronunciation: /ˈʌɪsə(ʊ)θəːm/Definition of isotherm noun a line on a map connecting points having the same temperature at a given time or on average over a given period. Physics a curve on a diagram joining points representing states of equal temperature. Derivatives isothermalPronunciation: /-ˈθəːm(ə)l/ adjective & noun isothermallyPronunciation: /-ˈθəːm(ə)li/ adverb Origin: mid 19th century: from French isotherme, from Greek isos 'equal' + thermē 'heat'isotherm in other Oxford dictionaries Definition of isotherm in the US English dictionary
