(systems theory) A closed trajectory in phase space of a dynamical system having the property that at least one other trajectory spirals into it either as time approaches infinity or as time approaches minus-infinity.

plural of life cycle

A part of a roadway designated for use by cyclists.

(economics) A long-term fluctuation in economic activity between growth and recession.

plural of cycle lane

plural of nasal cycle

The periodic alternation in the use of the left or the right nostril more actively for breathing, occurring in humans, caused by periodic swelling of the nasal conchae on one side of the nose and its reversal.

(graph theory) A Hamiltonian path with an additional connection between the first and last vertices visited, forming a cycle.

plural of Hamiltonian cycle

plural of water cycle