nabla

noun

nab·​la

ˈnablə

plural -s

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

Word History

Etymology

Greek, of Semitic origin; akin to Hebrew nēbhel harp

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