The curve traced by a point on the circumference of a circle as it rolls without slipping along a straight line. The length of the arc formed by one revolution of the circle is 8r, where r is the radius of the circle. The horizontal distance between cusps is 2πr.
The curve traced out by a point P on the circumference of a circle of radius a that rolls without slipping along a straight line. The cycloid has parametric equations x = a(t−sint), y = a(1−cost) (t∈ℝ). In the figure, OA = 2πa. (See brachistochrone.)
Tracing a cycloid
- flavin adenine dinucleotide
- flavones
- flavonoid
- flavonoids
- flavoprotein
- flavour
- flax
- F layer
- F-layer
- FLC protein
- fleas
- Fleischmann, Martin
- Fleming, Sir Alexander
- Fleming, Sir Alexander (1881–1955)
- Fleming, Sir John Ambrose
- Fleming, Williamina
- Fleming, Williamina Paton (1857–1911)
- Fleming’s rules
- Flemming, Walther
- Flerov, Georgii Nikolaevich
- flerovium
- FLEX
- flex
- flexible accumulation
- flexible array