sistrum
Concise Oxford English Dictionary © 2008 Oxford University Press:
sistrum /ˈsɪstrəm/
▶noun (pl. sistra /-trə/) a musical instrument of ancient Egypt consisting of a metal frame with transverse metal rods which rattled when the instrument was shaken.
– origin ME: via L. from Gk seistron, from seiein ‘to shake’.
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