ACHROMATIC SPINDLE

\ˌakɹə͡ʊmˈatɪk spˈɪndə͡l], \ˌakɹə‍ʊmˈatɪk spˈɪndə‍l], \ˌa_k_ɹ_əʊ_m_ˈa_t_ɪ_k s_p_ˈɪ_n_d_əl]\
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1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland
 
1916 - Appleton's medical dictionary
By Smith Ely Jelliffe