HYDROAEROPLANE

\hˈa͡ɪdɹə͡ʊəɹˌɒple͡ɪn], \hˈa‍ɪdɹə‍ʊəɹˌɒple‍ɪn], \h_ˈaɪ_d_ɹ_əʊ_ə_ɹ_ˌɒ_p_l_eɪ_n]\
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1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald