Entries on طنطن in 2 Arabic dictionaries by the authors Supplément aux dictionnaires arabes by Reinhart Dozy and Habib Anthony Salmone, An Advanced Learner's Arabic-English Dictionary
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طنطن
طَنْطَنَ
a. Resounded, clanged (metal).
b. Hummed, buzzed (insect).
طُنْطُرْر
a. [ coll. ], Long pointed cap
head-dress.