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Vinony

nabla

noun

  1. differential operator in vector calculus
  2. mathematical symbol
L495352 on Wikidata ↗

Wiktionary

noun

Etymology: From Latin nabla, from Ancient Greek νάβλα (nábla, “Phoenician harp”), from ancient Hebrew נֵבֶל (nḗḇel) or a Phoenician cognate. Doublet of nebel, which comes via the modern Hebrew נֵ֤בֶל.

  1. A Hebrew stringed instrument.
  2. The symbol ∇, used to denote the gradient operator.