Cycle

sī′kl, n. a period of time in which events happen in a certain order, and which constantly repeats itself: an imaginary circle or orbit in the heavens: a series of poems, prose romances, ., centring round a figure or event—also Cy′clus : an abbreviation for bicycle and tricycle.— v.i. to move in cycles: to ride or take exercise on a bicycle or tricycle.— adjs. Cy′clic , -al , pertaining to or containing a cycle.— ns. Cy′clist , for bicyclist or tricyclist; Cy′clograph , an instrument for describing the arcs of circles that have too large a curvature for compa es; Cy′cloid , a figure like a circle: a curve made by a point in a circle, when the circle is rolled along a straight line.— adj. Cycloid′al .— ns. Cycloid′ian , one of the fourth order of fishes, according to the cla ification of Aga iz, having cycloid scales with smooth edges, as the salmon; Cyclom′eter , an instrument for measuring circular arcs: an apparatus attached to the wheel of a cycle for registering the distance traversed; Cy′clorn , a cycle-horn. [Gr. kyklos , a circle.]