Definition of coumarone in English:

coumarone

Syllabification: cou·ma·rone
Pronunciation: /ˈko͞oməˌrōn
 
/

noun

Chemistry

Origin

late 19th century: from coumarin + -one.

Definition of coumarone in:

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Word of the day demoralize
Pronunciation: dəˈmôrəˌlīz
verb
cause (someone) to lose confidence or hope; dispirit