Fog ring

a bank of fog arranged in a circular form, - often seen on the coast of Newfoundland.

See also: Fog

Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
Additionally, Eric Energy will present two shows: <em>Science Spectacular</em> about air and matter, vortex fog rings, bubbling potions, and clouds on the ground, at 11 a.m.; and <em>Spark Attack</em>, covering circuits, sound waves, and different kinds of light and a demonstration of indoor lightning, a voice changer, and a real laser light show, at 12:15 p.m.