HYPERACUTE

\hˈa͡ɪpəɹˌakjuːt], \hˈa‍ɪpəɹˌakjuːt], \h_ˈaɪ_p_ə_ɹ_ˌa_k_j_uː_t]\
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1908 - Chambers's Twentieth Century Dictionary of the English Language
By Thomas Davidson
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe