MATHEMATICAL RELATION
\mˌaθɪmˈatɪkə͡l ɹɪlˈe͡ɪʃən], \mˌaθɪmˈatɪkəl ɹɪlˈeɪʃən], \m_ˌa_θ_ɪ_m_ˈa_t_ɪ_k_əl ɹ_ɪ_l_ˈeɪ_ʃ_ə_n]\
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a relation between mathematical expressions (such as equality or inequality)
By Princeton University
Word of the day
Tetrabromsulphthalein
 A phenolphthalein that is used as diagnostic aid in heptatic function determination.