noun nab·la \ˈnablə\

Definition of nabla



  1. 1 :  an ancient stringed instrument probably like a Hebrew harp of 10 or 12 strings —called also nebel

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

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Origin and Etymology of nabla

Greek, of Semitic origin; akin to Hebrew nēbhel harp

Seen and Heard

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a rounded knoll or a ridge of ice

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