Definition of rubberoid in English:

rubberoid

Syllabification: rub·ber·oid
Pronunciation: /ˈrəbəˌroid
 
/

adjective

Made of or resembling rubber.

Definition of rubberoid in:

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