form factor

/F AO1 R M F AE0 K T ER0/
noun
  1. 1

    The ratio of the RMS value to the absolute mean of a sinusoidal wave (especially to that of an alternating current)

  2. 2

    Any of several functions that describe the unknown internal state of a particle

  3. 3

    The emissivity of a material

  4. 4

    A function that describes the scattering power of an atom as function of the scattering angle

  5. 5

    A factor describing the stress distribution of a body

  6. 6

    The geometry of an object, especially in engineering design; configuration.

Source: https://en.wiktionary.org/wiki/form%20factor