British Dictionary definitions for jean baptiste joseph fourier
/ˈfʊərɪˌeɪ; French furje/
(François Marie) Charles (ʃarl). 1772–1837, French social reformer: propounded a system of cooperatives known as Fourierism, esp in his work Le Nouveau monde industriel (1829–30)
Jean Baptiste Joseph (ʒɑ̃ batist ʒozɛf). 1768–1830, French mathematician, Egyptologist, and administrator, noted particularly for his research on the theory of heat and the method of analysis named after him
(fr'ē-ā', f-ryā') French mathematician and physicist who introduced the expansion of periodic functions in the trigonometric series that is now named for him. He also studied the conduction of heat in solid bodies.