AEROHYDRODYNAMIC

\ˌe͡əɹə͡ʊhˌa͡ɪdɹəda͡ɪnˈamɪk], \ˌe‍əɹə‍ʊhˌa‍ɪdɹəda‍ɪnˈamɪk], \ˌeə_ɹ_əʊ_h_ˌaɪ_d_ɹ_ə_d_aɪ_n_ˈa_m_ɪ_k]\
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2010 - New Age Dictionary Database
By Oddity Software
 
1913 - Webster's Revised Unabridged Dictionary
By Noah Webster.