del

noun
  1. A mathematical operator used in vector calculus, represented by the symbol ∇, which denotes the gradient, divergence, or curl of a field. noun
    The del operator is used to calculate the gradient of a scalar field.
    In vector calculus, del is applied to vector fields to find the divergence.
  2. An abbreviation for 'delete', commonly used in computing contexts to refer to the action of removing or erasing data. verb
    Press the del key to remove the selected text.
    The del command in DOS is used to delete files from the directory.