1) Atmospheric dynamic 
Cyclogenesis is the development or strengthening of cyclonic circulation in the atmosphere (a low pressure area). Cyclogenesis is an umbrella term for several different processes, all of which result in the development of some sort of cyclone. It can occur at various scales, from the microscale to the synoptic scale. Extratropical cyclones form as...
Process of initiation or intensification of a cyclonic circulation in the atmosphere; the opposite to cyclolysis.
(from the article `atmosphere`) ...stage are referred to as wave cyclones, while extratropical lows that reach the mature and occluded stages are called baroclinically unstable ... ...this reservoir to be tapped, a cyclone (called a wave, or frontal, cyclone) must develop much in the way shown in the diagram. The feature that is ... ...
Development or intensification of a low-pressure center
Process of cyclone formation, maturation, and death.
process of initiation or intensification of a cyclonic circulation in the atmosphere; the opposite to cyclolysis .
the intensification or development of a cyclone. Cf. cyclolysis.