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1 definition found
 for nabla
From The Collaborative International Dictionary of English v.0.48 :

  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.
     [PJC]

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