unvarying in nature

a quantity that does not vary

steadfast in purpose or devotion or affection

United States writer of thrillers (born in 1925)

uninterrupted in time and indefinitely long continuing

English composer and conductor (1905-1951)

a cgs unit of illumination equal to the brightness of a perfectly diffusing surface that emits or reflects one lumen per square centimeter

a number representing a quantity assumed to have a fixed value in a specified mathematical context

- factor of proportionality,
- coefficient,
- number,
- speed of light,
- ionic charge,
- universal gravitational constant,
- G,
- Hubble parameter,
- Hubble's constant,
- Boltzmann's constant,
- Avogadro number,
- light speed,
- Avogadro's number,
- Hubble's parameter,
- gas constant,
- cosmological constant,
- R,
- gravitational constant,
- equilibrium constant,
- c,
- constant of gravitation,
- constant of proportionality,
- universal gas constant,
- Hubble constant

a former luminance unit equal to one lumen per square foot

a disease seen in patients with lung cancer and characterized by weakness and fatigue of hip and thigh muscles and an aching back; caused by antibodies directed against the neuromuscular junctions