MEGALOMANIAC

\mˌɛɡələmˈe͡ɪnɪˌak], \mˌɛɡələmˈe‍ɪnɪˌak], \m_ˌɛ_ɡ_ə_l_ə_m_ˈeɪ_n_ɪ__ˌa_k]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1920 - A practical medical dictionary.
By Stedman, Thomas Lathrop