Irrotational - Glossary of Meteorology
glossary.ametsoc.org › wiki › Irrotationalirrotational. Applied to a vector field having zero vorticity or curl throughout the field. Two equivalent properties of an irrotational field are that there is no circulation about any reducible curve within the fluid, and that a potential exists. An autobarotropic fluid is irrotational for all time if it is irrotational at any time.