HELIANTHIN
\hˈɛli͡ənθˌɪn], \hˈɛliənθˌɪn], \h_ˈɛ_l_iə_n_θ_ˌɪ_n]\
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An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry; - called also methyl orange.
By Oddity Software