# Dictionary:Irrotational

(ir, ō tā’ sh∂ n∂l) The property of a vector function whose curl vanishes. An irrotational vector field ${\displaystyle \mathbf {A} }$ is conservative and can be expressed as the gradient of a scalar field ${\displaystyle \phi }$, ${\displaystyle \mathbf {A} =\nabla {\phi }}$.