HARDIHOOD
\hˈɑːdɪhˌʊd], \hˈɑːdɪhˌʊd], \h_ˈɑː_d_ɪ_h_ˌʊ_d]\
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By William Dodge Lewis, Edgar Arthur Singer
By James Champlin Fernald
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n. [English] Daring courage; boldness; firmness; intrepidity;—bodily strength acquired by exercise; vigour; robustness;—assurance; excessive confidence; effrontery.
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Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.