Correct spelling for the English word "muavine" is [mjˈuːɐvˌa͡ɪn], [mjˈuːɐvˌaɪn], [m_j_ˈuː_ɐ_v_ˌaɪ_n] (IPA phonetic alphabet).
An alkaloid from muava-bark, obtained from an African tree of the genus Erythrophloeum; it is similar in its properties to erythrophleine, the alkaloid of sassy-bark.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.