parameter

noun11

1. •
   A variable that describes a property or characteristic of some system (material, object, event, etc.) or some aspect thereof.

   • Cohesion parameters (solubility parameters) can be used with full theoretical justification to characterize many surfaces ... — 2007
2. •
   Any measured quantity of a statistical population that summarises or describes an aspect of the population.
3. •
   A variable of a model that is trained by a machine learning algorithm.

   • The parameter estimation problem considered in this chapter consists of estimating the unknown parameter, ū [a barred v, actually], given N samples of the observation process. — 2012
4. •
   A characteristic or feature that distinguishes something from others.
5. •
   An input variable of a function definition, that gets an actual value (argument) at execution time.
6. •
   A value kept constant during an experiment, equation, calculation, or similar, but varied over other versions of the experiment, equation, calculation, etc.
7. •
   An actual value given to such a formal parameter.
8. •
   In the ellipse and hyperbola, a third proportional to any diameter and its conjugate, or in the parabola, to any abscissa and the corresponding ordinate.

   • The parameter of the principal axis of a conic section is called the latus rectum.
9. •
   The ratio of the three crystallographic axes which determines the position of any plane.
10. •
    The fundamental axial ratio for a given species.
11. •
    Clipping of uniformizing parameter.