Webster's 1913 Dictionary
SISTRUM
Sis "trum, Etym: [L., fr. Gr. (Mus. )
Defn: An instrument consisting of a thin metal frame, through which passed a number of metal rods, and furnished with a handle by which it was shaken and made to rattle. It was peculiarly Egyptian, and used especially in the worship of Isis. It is still used in Nubia.
New American Oxford Dictionary
sistrum
sis trum |ˈsistrəm ˈsɪstrəm | ▶noun ( pl. sistra |ˈsistrə | or sistrums ) a musical instrument of ancient Egypt consisting of a metal frame with transverse metal rods that rattled when the instrument was shaken. ORIGIN late Middle English: via Latin from Greek seistron, from seiein ‘to shake. ’
Oxford Dictionary
sistrum
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 late Middle English: via Latin from Greek seistron, from seiein ‘to shake ’.
Duden Dictionary
Sistrum
Sis t rum , Sis trum Substantiv, Neutrum , das |S i strum |das Sistrum; Genitiv: des Sistrums, Plural: die Sistren griechisch-lateinisch ein altägyptisches Rasselinstrument, bei dem durch Metallstäbe ein klirrendes Geräusch hervorgerufen wird
The Wordsmith Dictionary