or·​ga·​nis·​trum | \ˌȯ(r)gəˈnistrəm\
plural organistrums

Definition of organistrum 

: a large medieval hurdy-gurdy played by two musicians In one scene, the king and queen are playing an organistrum, the predecessor of the minstrels' hurdy-gurdy …— Benito Varela Jácome and A. Rodríguez Gonzáles, Santiago de Compostela, 1978

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First Known Use of organistrum

1847, in the meaning defined above

History and Etymology for organistrum

Medieval Latin, from Latin organum organ

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