A person with bipolar disorder, often used when comparing the speed of mood swings.
A device for performing dialysis; for mechanically purifying blood.
An orbit that approaches two astronomical bodies on a regular basis.
Anything with a cyclic (repetitious) behaviour. Something that cycles between different states.
A task in a cycle of tasks where the status of being active task is passed around the loop.
A, usually man-made, object that follows such an orbit.