(physics) An electric current in which the direction of flow of the electrons reverses periodically.

A cold ocean current originating in the Southern Ocean surrounding Antarctica, thence flowing northwards up the west coast of Africa as far as Angola. It provides nutrients for the sea life in the fishing grounds off the Cape of Good Hope.

(physics) An exchange current which carries no electric charge and mediates certain types of electroweak interactions.

A city in Saskatchewan, Canada.

(geology) A fast-flowing downhill current (of air or water) that carries silt

plural of down-current

Without deliberation or hesitation: extempore, off-the-cuff.

plural of ocean current

(physics) The temperature-dependent current that flows in a photodetector when no light is shining on it.

The transfer of heat by the movement of a fluid, usually as the result of convection