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The Collaborative International Dictionary
nabla

del \del\ n. (Math.) a differential operator which, operating on a function of several variables, gives the sum of the partial derivatives of the function with respect to the three orthogonal spatial coordinates; -- also called the gradient or grad. It is represented by an inverted Greek capital delta ([nabla]), and is thus because of its shape also called nabla, meaning harp in Hebrew.

Wiktionary
nabla

n. 1 (Hebrew) A Hebrew stringed instrument. 2 (context analysis English) The symbol ∇, used to denote the gradient operator.

Wikipedia
Nabla

Nabla may refer to one of the following:

  • the nabla symbol ∇
  • the vector differential operator, also called del, denoted by the nabla
  • Nabla, tradename of a type of rail fastening system (of roughly triangular shape)
  • Nabla (moth), a genus of moth
  • Nabla (instrument), the Greek word for a Phoenician or Hebrew stringed instrument after the triangular shape of which all of the above are named
Nabla (moth)

Nabla is a genus of moth in the family Geometridae.

Usage examples of "nabla".

The `dot product' and the `cross product' after the nablas are statements of two different kinds of spatial variation.

The 'dot product' and the 'cross product' after the nablas are statements of two different kinds of spatial variation.