conservation of energy conservation of electricity • conservation of mass · · · Info · Definitions · Synonyms · Characters · · conservation of energy · · Text Common · · Latin · · Scripts 22 · · Length 8 · · Syllables Definitions · · · (noun) the fundamental principle of physics that the total energy of an isolated system is constant despite internal changes. Synonyms: conservation of energy, law of conservation of energy, first law of thermodynamics. · · Noun Definition 1 Synonyms · · · law of conservation of energy · · Synonym 1 first law of thermodynamics · · Synonym 2 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 e latin small letter e U+0065 f latin small letter f U+0066 g latin small letter g U+0067 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074 v latin small letter v U+0076 y latin small letter y U+0079