TROPICAL ZONE

\tɹˈɒpɪkə͡l zˈə͡ʊn], \tɹˈɒpɪkə‍l zˈə‍ʊn], \t_ɹ_ˈɒ_p_ɪ_k_əl z_ˈəʊ_n]\
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2011 - English Dictionary Database
By DataStellar Co., Ltd
 
2006 - WordNet 3.0
By Princeton University