cycler

Short definition from Wiktionary

Noun

1. 1
   Anything with a cyclic (repetitious) behaviour. Something that cycles between different states.
2. 2
   An orbit that approaches two astronomical bodies on a regular basis.
3. 3
   A, usually man-made, object that follows such an orbit.
4. 4
   A person with bipolar disorder, often used when comparing the speed of mood swings.
5. 5
   A device for performing dialysis; for mechanically purifying blood.
6. 6
   Ellipsis of thermal cycler, a machine for creating multiple copies of DNA sequences.
7. 7
   A task in a cycle of tasks where the status of being active task is passed around the loop.
8. 8
   cyclist