RATIONAL NUMBER

\ɹˈaʃənə͡l nˈʌmbə], \ɹˈaʃənə‍l nˈʌmbə], \ɹ_ˈa_ʃ_ə_n_əl n_ˈʌ_m_b_ə]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd