PITH HELMET

\pˈɪθ hˈɛlmɪt], \pˈɪθ hˈɛlmɪt], \p_ˈɪ_θ h_ˈɛ_l_m_ɪ_t]\
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2006 - WordNet 3.0
By Princeton University
 
2011 - English Dictionary Database
By DataStellar Co., Ltd

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Quinones

  • Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.
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