| coefficient | | |
| n. (quantity) | 1. coefficient | a constant number that serves as a measure of some property or characteristic. |
| ~ constant | a number representing a quantity assumed to have a fixed value in a specified mathematical context.; "the velocity of light is a constant" |
| ~ absorptance, absorption coefficient, coefficient of absorption | a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber.; "absorptance equals 1 minus transmittance" |
| ~ coefficient of drag, drag coefficient | the ratio of the drag on a body moving through air to the product of the velocity and the surface area of the body. |
| ~ coefficient of friction | the ratio of the weight of an object being moved along a surface and the force that maintains contact between the object and the surface. |
| ~ coefficient of mutual induction, mutual inductance | a measure of the induction between two circuits; the ratio of the electromotive force in a circuit to the corresponding change of current in a neighboring circuit; usually measured in henries. |
| ~ coefficient of self induction, self-inductance | the ratio of the electromotive force produced in a circuit by self-induction to the rate of change of current producing it, expressed in henries. |
| ~ modulus | (physics) a coefficient that expresses how much of a specified property is possessed by a specified substance. |
| ~ coefficient of expansion, expansivity | the fractional change in length or area or volume per unit change in temperature at a given constant pressure. |
| ~ coefficient of reflection, reflectance, reflection factor, reflectivity | the fraction of radiant energy that is reflected from a surface. |
| ~ transmittance, transmission | the fraction of radiant energy that passes through a substance. |
| ~ absolute viscosity, coefficient of viscosity, dynamic viscosity | a measure of the resistance to flow of a fluid under an applied force. |
| ~ weighting, weight | (statistics) a coefficient assigned to elements of a frequency distribution in order to represent their relative importance. |
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