NITROGEN FIXATION

\nˈa͡ɪtɹəd͡ʒən fɪksˈe͡ɪʃən], \nˈa‍ɪtɹəd‍ʒən fɪksˈe‍ɪʃən], \n_ˈaɪ_t_ɹ_ə_dʒ_ə_n f_ɪ_k_s_ˈeɪ_ʃ_ə_n]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
2010 - Medical Dictionary Database
By DataStellar Co., Ltd