1. (noun) a constant number that serves as a measure of some property or characteristic

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

1. (noun) a constant number that serves as a measure of some property or characteristic

• constant