| 单词 | coefficient |
| 释义 | coefficient (once / 9728 pages) n In math and science, a coefficient is a constant term related to the properties of a product. In the equation that measures friction, for example, the number that always stays the same is the coefficient. In plain English, coefficient means "joining together to produce a result." Sometimes people use the word to talk about social phenomena, like the coefficient factors of vanity and self-loathing in a celebrity's alcoholic demise. But mostly you'll encounter it in math and science. In algebra, the coefficient is the number that you multiply a variable by, like the 4 in 4x=y. In chemistry, when you see a number in front of a chemical like 2H2o, you're looking at the coefficient. WORD FAMILYcoefficient: coefficients USAGE EXAMPLESNo one would predict that inequality within the African-American community — the Gini coefficient — would be higher than for white people or Hispanic people. Salon(Nov 12, 2016) Compared with the 1990s, income inequality is higher as measured by the Gini coefficient. Economist(Oct 27, 2016) Nerds want to know: what is the correlation coefficient?? New York Times(Sep 29, 2016) n a constant number that serves as a measure of some property or characteristic Hypo|Hyper 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 coefficient of drag, drag coefficientthe 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 frictionthe 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 inductancea 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-inductancethe 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, expansivitythe fractional change in length or area or volume per unit change in temperature at a given constant pressure coefficient of reflection, reflectance, reflection factor, reflectivitythe fraction of radiant energy that is reflected from a surface transmission, transmittancethe fraction of radiant energy that passes through a substance absolute viscosity, coefficient of viscosity, dynamic viscositya measure of the resistance to flow of a fluid under an applied force weight, weighting(statistics) a coefficient assigned to elements of a frequency distribution in order to represent their relative importance coefficient of elasticity, elastic modulus, modulus of elasticity(physics) the ratio of the applied stress to the change in shape of an elastic body constant a number representing a quantity assumed to have a fixed value in a specified mathematical context |
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