COUNTERPOISON

\kˈa͡ʊntəpˌɔ͡ɪzən], \kˈa‍ʊntəpˌɔ‍ɪzən], \k_ˈaʊ_n_t_ə_p_ˌɔɪ_z_ə_n]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd
 
1898 - American pocket medical dictionary
By Willam Alexander Newman Dorland