RETROROCKET

\ɹˌɛtɹə͡ʊɹˈɒkɪt], \ɹˌɛtɹə‍ʊɹˈɒkɪt], \ɹ_ˌɛ_t_ɹ_əʊ_ɹ_ˈɒ_k_ɪ_t]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd