the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body

a constant number that serves as a measure of some property or characteristic

- transmittance
- reflectance
- coefficient of expansion
- constant
- weight
- reflection factor
- coefficient of friction
- expansivity
- drag coefficient
- coefficient of self induction
- reflectivity
- coefficient of viscosity
- absorption coefficient
- modulus
- absolute viscosity
- self-inductance
- coefficient of drag
- dynamic viscosity
- coefficient of absorption
- coefficient of reflection
- weighting
- transmission
- absorptance
- mutual inductance
- coefficient of mutual induction

to lag or linger behind

the phenomenon of resistance to motion through a fluid

move slowly and as if with great effort