Area of low pressure in the atmosphere that displays circular inward movement of air. In the Northern Hemisphere circulation is counterclockwise, while Southern Hemisphere cyclones have clockwise wind [..]

(abbrev. CYC) - A large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere.

1848, coined by British East India Company official Henry Piddington to describe the devastating storm of December 1789 in Coringa, India; irregularly formed from a Latinized form of Greek kyklon &quo [..]

weather system that rotates around a center of low pressure and includes thunderstorms and rain. Usually, hurricanes refer to cyclones that form over the Atlantic Ocean.

Atmospheric circulations that rotate clockwise in the southern hemisphere, and anti-clockwise in the northern hemisphere. Cyclones are areas of lower pressure and generally associated with stronger wi [..]

a low-pressure center wrapped in rotating movements of air. Cyst: a capsule-like sac that encloses a spore, parasite, or abnormal growth.

(meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the northern hemisphere and clockwise in the southern a violent rotating windstorm (cyclo [..]

extremely low pressure system. See hurricane.

An atmospheric closed circulation rotating counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. Source NOAA-NHC.

A wind system consisting of violent, rotating winds and a calm central eye. Also referred to as hurricanes or typhoons. Learn more.

A depression.

(n) - a low pressure center where air moves toward the center

 – A cylindrical device that separates powder particles from the air stream by centrifugally spinning the particles around its perimeter to the bottom for recovery. Some of the finer particles pass th [..]

area in the atmosphere that has lower pressure than the surrounding areas and has winds that spiral toward the center. cytology

(n) (meteorology) rapid inward circulation of air masses about a low pressure center; circling counterclockwise in the northern hemisphere and clockwise in the southern(n) a violent rotating windstorm [..]

An area of low pressure around which winds blow counterclockwise in the Northern Hemisphere. Also the term used for a hurricane in the Indian Ocean and in the Western Pacific Ocean. In Australia, it i [..]

An area of low pressure around which the winds blow counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. It is usually associated with stormy weather

An atmospheric closed circulation rotating counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

An area of low atmospheric pressure with converging and ascending air flows that rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

An area of closed pressure circulation with rotating and converging winds. The circulation is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. Also called a low pr [..]

Non-frontal low-Pressure systems over tropical or sub-tropical waters with organized Convection and definite pattern of surface Wind circulation.

A low-pressure system in which winds spin inward in a counterclockwise direction in the northern hemisphere. Tropical cyclone is used to describe a hurricane or typhoon in the Indian Ocean.

a large-scale, atmospheric wind-and-pressure system characterized by low pressure at its center and by circular wind motion, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemi [..]

A tropical storm with winds of 74 mph or greater in the South Western Pacific Ocean (Philippines), South China Sea, and the Indian Ocean. See "Storm" and "Weather Warnings" Appendix D

An area of low pressure where winds blow counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. See anticyclone, wind.

An air pollution control device that removes larger particles -- generally greater than one micron -- from an air stream through centrifugal force.

An area of low atmospheric pressure that has a closed circulation. Cyclones (or more commonly called "low pressure areas") rotate counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. They usually bring about clouds and precipitation.

A sampling device used to collect and separate respirable particulate mass. The cyclone functions as a centrifuge; the rapid circulation of air separates particles according to size.

A large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere. Also includes: Genoa Cyclone, Lee cyclone, Medicane, Storm.

A cyclone is a warm air mass that rotates around a center of strong low pressure. Typhoons and hurricanes are both types of cyclone. If the cyclone forms over the Atlantic Ocean or eastern Pacific Oce [..]

1. A meteorological phenomena characterized by relatively low atmospheric pressure and winds which blow counterclockwise around the center in the Northern Hemisphere and clockwise in the Southern Hemi [..]

(1) An area of low atmospheric pressure which has a closed circulation that is cyclonic, i.e., as viewed from above, the circulation is counterclockwise in the Northern Hemisphere, clockwise in the So [..]

A conical-shaped vessel for separating mixed sized particulates from the gas stream. The vessel has a tangential entry at the largest diameter allowing the larger particles to drop out and be removed from the bottom of the cone while smaller particulate exits overhead with the majority of the gas stream.

(abbrev. CYC) - A large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere.

an air pollution abatement device that removes heavy particles from an air stream through centrifugal force

An area of closed pressure circulation with rotating and converging winds, the center of which is a relative pressure minimum. The circulation is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. Also called a low pressure system and the term used for a tropical cyclone in the Indian Ocean. Other phenomena with c [..]

An area of low pressure. Winds blow in a counter clockwise direction in the Northern Hemisphere and in a clockwise direction in the Southern Hemisphere. Inclimate weather is associated with a cyclone. [..]

Large scale atmospheric circulations in which the winds rotate clockwise in the Southern Hemisphere. Cyclones are areas of low atmospheric pressure and are often associated with strong winds, cloud and rainfall. Cyclone is a general term covering all cyclonic systems in the atmosphere and should not be confused with Tropical Cyclone. Interchangeabl [..]

See Tropical storm

A type of atmospheric disturbance characterized by masses of air rapidly circulating, clockwise in the southern hemisphere and counterclockwise in the northern hemisphere, about a low-pressure center. while even the weakest of low-pressure storms can be defined as a cyclone, the term is most often associated with stormy, often destructive, weather.

A large area of low atmospheric pressure, characterised by inward-spiralling wind often called a ‘low’ or a ‘depression’. Also the name used for a hurricane in the Indian Ocean and Western Pacific. [..]

An area of low pressure around which winds blow in a counter clockwise direction in the Northern Hemisphere and a clockwise direction in the Southern Hemisphere. Inclement weather is often associated [..]

An atmospheric closed circulation rotating counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

A closed, rotating wind. Cyclones rotate counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

A weather system characterized by relatively low surface air pressure compared with the surrounding air; same as a low

An area of low pressure

intense low pressure weather systems; mid-latitude cyclones are atmospheric circulations that rotate clockwise in the Southern Hemisphere and anti-clockwise in the Northern Hemisphere and are generall [..]

An area of low pressure around which winds blow counterclockwise in the Northern Hemisphere. Also the term used for a hurricane in the Indian Ocean and in the Western Pacific Ocean.

An area of closed pressure circulation with rotating and converging winds, the center of which is a relative pressure minimum. The circulation is counterclockwise in the Northern Hemisphere and clockw [..]

An area of closed pressure circulation with rotating and converging winds, the center of which is a relative pressure minimum. The circulation is counterclockwise in the Northern Hemisphere and clockw [..]

An area of closed pressure circulation with rotating and converging winds, the center of which is a relative pressure minimum. The circulation is counterclockwise in the Northern Hemisphere and clockw [..]

An area of closed pressure

Describes the flow around a low pressure system. Cyclone means the axis of rotation of the wind has a component oriented in the same direction as the spin of the earth. When you look at the earth from above the South Pole it spins in a clockwise direction.

An atmospheric closed circulation rotating counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.

(abbrev. CYC) - A large-scale circulation of winds around a central region of low atmospheric pressure, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere.

An area of low atmospheric pressure with winds blowing around it, counterclockwise in the Northern Hemisphere, clockwise in the Southern Hemisphere.

An area of closed pressure circulation with rotating and converging winds, the center of which is a relative pressure minimum. The circulation is counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. Also called a low pressure system and the term used for a tropical cyclone in the Indian Ocean. Other phenomena with c [..]

A type of separator for removal of larger particles from an exhaust gas stream. Gas laden with particulates enters the cyclone and is directed to flow in a spiral causing the entrained particulates to fall out and collect at the bottom. The gas exits near the top of the cyclone.

A system of winds rotating around a center of low atmospheric pressure. A low pressure system. (informal) The more or less violent, small-scale circulations such as tornadoes, waterspouts, and d [..]

An extreme low pressure weather system.

A large-scale closed-circulation atmospheric system with low central barometric pressure rotating counter clockwise in the northern hemisphere and clockwise in the southern hemisphere.