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Answer for the clue "Del Shannon, a Blackfoot at heart ", 5 letters:
nabla

Alternative clues for the word nabla

Word definitions for nabla in dictionaries

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
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 ...

Wikipedia Word definitions in Wikipedia
Nabla is a genus of moth in the family Geometridae .

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

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.