BIPENNIFORM

\ba͡ɪpˈɛnɪfˌɔːm], \ba‍ɪpˈɛnɪfˌɔːm], \b_aɪ_p_ˈɛ_n_ɪ_f_ˌɔː_m]\
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1920 - A dictionary of scientific terms.
By Henderson, I. F.; Henderson, W. D.
 
1920 - A dictionary of scientific terms (6th edition)
By J.H. Kenneth
 
1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland