del(redirected from Nabla operator)
Also found in: Medical, Encyclopedia.
(Mathematics) maths the differential operator i(∂/∂x) + j(∂/∂y) + k(∂/∂z), where i, j, and k are unit vectors in the x, y, and z directions. Symbol: ∇ Also called: nabla
a differential operator. Symbol:∂
[1900–05; short form of delta]
1. delegate; delegation.