Areas of slack or counter moving water, usually created by the shape of the shoreline or obstacles above or slightly below the water line. Found in rivers and in oceans where there is a current.

A name given to the deviation from steady motion which occurs in any viscous fluid which flows past an obstacle, or in which neighbouring streams flow past or over each other. Air and water eddies are formed over and around a ship as she moves along.

A little whirlpool or whirlwind.

The irregular motion of a fluid - in aeronautics, air - when flowing above a certain speed or around an object. In eddy motion the flow moves in irregular swirls.

A localized chaotic movement of air or liquid in a generally uniform larger flow.

A whirl or backward current of water. A vortex. That portion of the water in a stream that actually swirls.

A relatively calm area on a river, usually away from the main current and close to the shore.

A place where the current either stops or turns to head upstream. Usually found below obstructions and on the inside of bends.

A pool of calmer water out of the main current of a stream, where upstream gates often are placed.

a slow current which forms beyond an obstacle (usually a rock). For paddlers, this quiet, still water is a good rest area.

comparative calm spots found on the downstream sides of rocks

a feature of ocean circulation where the direction of circulation is circular or elliptical

An isolated, ring-shaped current of water.

A small rotating area of water.

a circular swirling of water, a whirlpool

A small volume of air (or any fluid) that behaves differently from the larger flow in which it exists.

A relatively calm area, away from the main current, often near the shore. Upstream gates are often located in eddies, so that the paddler will not have to fight the current's full force.

a miniature whirlpool or whirlwind resulting when the current of a fluid doubles back on itself

flow in a circular current, of liquids

a circulation that develops when the wind flows over or adjacent to rough terrain, buildings, mountains or other obstructions

a current (like a whirlpool) that runs contrary to the main current

an area, usually near strong current that has a backflow of current

a paddlers best friend

a place where the water is either not moving or sometimes even moving slightly upstream

a pool of calmer water that sits immediately downstream of a boulder or riverside promontory

a relatively calm spot in the river downstream of a rock, island, sand or gravel bar, or alongside the shore

a spot on the river behind large rocks or other obstacles where the water is actually moving up stream

a small volume of air that behaves differently from the layer that surrounds it, acting with a life of its own. An example would be a tornado, which has its own distinct rotation, but is different than the large flow of air surrounding the thunderstorm in which the tornado is born.

Water flowing upstream behind a rock or other obstacle. Eddies often provide a safe place to get out of the current.

swirl in a fluid.

A circular current of water flowing opposite to the direction of the main stream.

A circular-like flow of a fluid (such as air or water) drawing its energy from a flow of much larger scale, and brought about by pressure irregularities as in the downwind (lee) side of a solid obstacle. For example, wind conditions may be erratic and may eddy on the downwind side of large rock outcroppings, buildings, etc.

A current--usually behind a large rock or other obstruction in a stream or river--which is at variance with the main current. Water flow in eddies either stops or reverses and runs upstream from the main current. Eddies can be used as rest stops or to maneuver upstream or downstream in a technique known as "eddy hopping."

A current of reverse water flow sometimes creating a small whirlpool.

a circular movement of water caused by obstruction in the flow of water, or the meeting of opposite currents

A circular current of water, usually resulting from an obstruction.

a pocket of water downstream of an obstacle that flows upstream or back against the main current

a section of water that is less disturbed than the surrounding water, found for example on the edge of a current or where two streams converge.

Area downstream of an obstruction where water swirls in a direction different from that of the main flow, usually upstream. Since a boat will not move if positioned correctly in an eddy, it is used to rest or set up for the next set of rapids.

A rotation or spin-off that is embedded within a fluid. Convection will have eddies at the edges of where air with different temperature and moisture properties is mixing.

A current of air, water, or any fluid, forming on the side of the main current, especially one moving in a circle; in extreme cases a whirlpool.

A small disturbance of wind in a large wind flow, which can produce turbulent conditions or turbulence. They can also be areas of warmer air north of the main westerlies or colder air south of the westerlies. (See cut-off high or cut-off low.) In oceanic circulation, it is a circular movement of water usually formed where currents pass obstructions, between two adjacent currents flowing counter to each other, or along the edge of a permanent current.

A current at variance with the main current, and where the main current either stops or reverses its flow upstream; caused by rocks, obstructions, or the bends in a river or stream. Once avoided as dangerous, eddies now are routinely used in maneuvers and for rest stops.

An area of slack water usually behind an obstruction (e.g. a rock)

a small, spinning air current that often develops when wind flows over buildings, mountains, or other obstructions

area of usually calm water behind or downstream of an obstruction in the main current, where water flows counter to that of the main current.

A calm spot formed downstream of a rock or other obstruction in the riverbed. eddies may be still or may move upstream.

Rotational flow around a vertical axis.

Swirling currents of air at variance with the main current.

A circular movement of water, in a comparatively limited area, formed on the side of a main current; may be created at a point where the mainstream passes a projection or meets an opposite current.

A condition of fluid flow, such as water or air current moving contrary to the main current, which affects the construction of HVAC or plumbing systems.

A current of water, especially one moving in a circular pattern, running against the main current

A circular movement or whirlpool occurring in flowing water due to currents created by various obstructions or dynamic forces in the water.

A current that goes against the main current, it causes a whirling motion to occur (much like a whirlpool).

A whirl or circling current of air or water, different and differentiated from the general flow.

A point of flow reversal, generally downstream of a large object partially interrupting the overall flow pattern.

A small disturbance of wind in a large wind flow, which can produce turbulent conditions. They can also be areas of warmer air north of the main westerlies or colder air south of the westerlies. In oceanic circulation, it is a circular movement of water usually formed where currents pass obstructions, between two adjacent currents flowing counter to each other, or along the edge of a permanent current. Related terms: cut-off high and cut-off low

In fluid dynamics, an eddy ford is the swirling of a fluid and the reverse current created when the fluid flows past an obstacle. The moving fluid creates a space devoid of downstream-flowing water on the downstream side of the object. Fluid behind the obstacle flows into the void creating a swirl of fluid on each edge of the obstacle, followed by a short reverse flow of fluid behind the obstacle flowing upstream, toward the back of the obstacle.