SPIRAL SUTURE

\spˈa͡ɪ͡əɹə͡l sˈuːt͡ʃə], \spˈa‍ɪ‍əɹə‍l sˈuːt‍ʃə], \s_p_ˈaɪə_ɹ_əl s_ˈuː_tʃ_ə]\
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1919 - The Concise Standard Dictionary of the English Language
By James Champlin Fernald