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Tympanum; timbrel, tabor, or drum.----A symbol of Cybele, which she holds in her right hand or sustains on her left knee.    Vaillant (Col. ii. 139) says that by this attribute some of the ancients supposed the globe of the earth to be signified; others regarded it as simply representing the cymbalum, or musical instrument of brass, which the priests of the above-named goddess used at her sacred rites.----See Crotalum, Cybele, MATRI DEVM.----The tympanum is seen in the hands of Cybele, on coins of Hadrian, Sabina, Faustina junior, Lucilla, Commodus, Clodius Albinus, Julia Domna, &c.

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