CARBONYL GROUP

\kˈɑːbənˌa͡ɪl ɡɹˈuːp], \kˈɑːbənˌa‍ɪl ɡɹˈuːp], \k_ˈɑː_b_ə_n_ˌaɪ_l ɡ_ɹ_ˈuː_p]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd