PERENNATION

\pˌɛɹɪnˈe͡ɪʃən], \pˌɛɹɪnˈe‍ɪʃən], \p_ˌɛ_ɹ_ɪ_n_ˈeɪ_ʃ_ə_n]\

Definitions of PERENNATION

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1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.