Generalized Helicoid
The Surface generated by a twisted curve 
when rotated about a fixed axis 
and, at the same time, displacedParallel to so that the velocity of displacement is always proportional to the Angular Velocity ofRotation.
References
do Carmo, M. P.; Fischer, G.; Pinkall, U.; and Reckziegel, H. ``General Helicoids.'' §3.4.3 in Mathematical Models from the Collections of Universities and Museums (Ed. G. Fischer). Braunschweig, Germany: Vieweg, pp. 36-37, 1986. Fischer, G. (Ed.). Plate 89 in Mathematische Modelle/Mathematical Models, Bildband/Photograph Volume. Braunschweig, Germany: Vieweg, p. 85, 1986. Kreyszig, E. Differential Geometry. New York: Dover, p. 88, 1991.
- Silver Constant
- Silverman Constant
- Silverman's Sequence
- Silver Mean
- Silver Ratio
- Similar
- Similarity Axis
- Similarity Dimension
- Similarity Point
- Similarity Transformation
- Similitude Center
- Similitude Ratio
- Simple Algebra
- Simple Continued Fraction
- Simple Curve
- Simple Graph
- Simple Group
- Simple Harmonic Motion
- Simple Harmonic Motion Quadratic Perturbation
- Simple Harmonic Oscillator
- Simple Interest
- Simple Polygon
- Simple Ring
- Simplex
- Simplex Method