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cycle US English

A series of events that are regularly repeated in the same order

two-cycle US English

another term for two-stroke.

cycle lane US English

A division of a road marked off with painted lines, for use by cyclists

cycle track US English

A path or road for bicycles and not motor vehicles

duty cycle US English

The cycle of operation of a machine or other device that operates intermittently rather than continuously

deep-cycle US English

Denoting a type of electric battery that can be totally discharged and recharged several times

Krebs cycle US English

The sequence of reactions by which most living cells generate energy during the process of aerobic respiration. It takes place in the mitochondria, consuming oxygen, producing carbon dioxide and water as waste products, and converting ADP to energy-rich ATP

rock cycle US English

An idealized cycle of processes undergone by rocks in the earth’s crust, involving igneous intrusion, uplift, erosion, transportation, deposition as sedimentary rock, metamorphism, remelting, and further igneous intrusion

song cycle US English

A set of related songs, often on a romantic theme, intended to form a single musical entity

water cycle US English

The cycle of processes by which water circulates between the earth’s oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration

lunar cycle US English

another term for Metonic cycle.

life cycle US English

The series of changes in the life of an organism, including reproduction

pedal cycle US English

A bicycle

carbon cycle US English

The series of processes by which carbon compounds are interconverted in the environment, chiefly involving the incorporation of carbon dioxide into living tissue by photosynthesis and its return to the atmosphere through respiration, the decay of dead organisms, and the burning of fossil fuels

estrous cycle US English

The recurring reproductive cycle in many female mammals, including estrus, ovulation, and changes in the uterine lining

Metonic cycle US English

A period of 19 years (235 lunar months), after which the new and full moons return to the same days of the year. It was the basis of the ancient Greek calendar and is still used for calculating movable feasts such as Easter

business cycle US English

A cycle or series of cycles of economic expansion and contraction

menstrual cycle US English

The process of ovulation and menstruation in women and other female primates

nitrogen cycle US English

The series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition

citric acid cycle US English

another term for Krebs cycle.

cycle of erosion US English

An idealized course of landscape evolution, passing from youthful stages, which are marked by steep gradients, to old age, when the landscape is reduced to a peneplain

tricarboxylic acid cycle US English

another term for Krebs cycle.

cycle path in cycle track US English

A path or road for bicycles and not motor vehicles

hemicycle US English

A semicircular shape or structure

handcycle US English

A three-wheeled cycle propelled by the arms rather than the legs, used as an alternative to a conventional bicycle by some disabled people

bicycle ricksha US English

A three-wheeled bicycle for public hire, with a covered seat for passengers behind the driver

vicious circle US English

A sequence of reciprocal cause and effect in which two or more elements intensify and aggravate each other, leading inexorably to a worsening of the situation

vicious cycle in vicious circle US English

A sequence of reciprocal cause and effect in which two or more elements intensify and aggravate each other, leading inexorably to a worsening of the situation

Calvin cycle in Calvin, Melvin US English

(1911–97), US biochemist; full name Melvin Ellis Calvin. He investigated photosynthesis and discovered the cycle of reactions (the Calvin cycle) that constitutes the dark reaction. Nobel Prize for Chemistry (1961)

Otto cycle in Otto, Nikolaus August US English

(1832–91), German engineer, whose name is given to Otto cycle, the four-stroke cycle on which most internal combustion engines work

cycle US Thesaurus

the cycle of birth, death, and rebirth

cycle English-Spanish

ciclo m

two-cycle English-Spanish

de dos tiempos

four-cycle English-Spanish

de cuatro tiempos

life cycle English-Spanish

ciclo m vital

combined-cycle English-Spanish

de ciclo combinado

cycle shed in cycle English-Spanish

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