nab·​la | \ ˈnablə \
plural -s

Definition of nabla

1 : an ancient stringed instrument probably like a Hebrew harp of 10 or 12 strings

called also nebel

2 [probably so called from the resemblance of its symbol, the inverted Greek delta, to a harp] : del

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History and Etymology for nabla

Greek, of Semitic origin; akin to Hebrew nēbhel harp

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“Nabla.” Dictionary, Merriam-Webster, Accessed 17 Feb. 2020.

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