# factor

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## factor,

in arithmetic, any number that divides a given number evenly, i.e., without any remainder. The factors of 12 are 1, 2, 3, 4, 6, and 12. Similarly in algebra, any one of the algebraic expressions multiplied by another to form a product is a factor of that product, e.g., a+b and ab are factors of a2b 2, since (a+b)(ab)=a2b2. In general, if r is a rootroot,
in mathematics, number or quantity r for which an equation f(r)=0 holds true, where f is some function. If f is a polynomial, r is called a root of f; for example, r=3 and r
of a polynomialpolynomial,
mathematical expression which is a finite sum, each term being a constant times a product of one or more variables raised to powers. With only one variable the general form of a polynomial is a0xn+a1x
equation f(x)=0, then (xr) is a factor of the polynomial f(x).

## factor

[′fak·tər]
(mathematics)
For an integer n, any integer which gives n when multiplied by another integer.
For a polynomial p, any polynomial which gives p when multiplied by another polynomial.
For a graph G, a spanning subgraph of G with at least one edge.
(statistics)
A quantity or a variable being studied in an experiment as a possible cause of variation.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## factor

1. Maths
a. one of two or more integers or polynomials whose product is a given integer or polynomial
b. an integer or polynomial that can be exactly divided into another integer or polynomial
2. Med any of several substances that participate in the clotting of blood
3. Law, Commerce a person who acts on another's behalf, esp one who transacts business for another
4. former name for a gene
5. Commercial law a person to whom goods are consigned for sale and who is paid a factorage
6. (in Scotland) the manager of an estate
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

## factor

A quantity which is multiplied by another quantity.

## factor

A number that divides evenly into another number. For example, 3 and 4 are factors of 12. See factorial and IFP.
Copyright © 1981-2019 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.
References in periodicals archive ?
The committee's report states: "The sums were covered in 2007-08 by a combination of the exchange rate gains and a "write-back" to the accounts of pounds 61m erroneously borne on earlier years' accounts because of accounting errors in previous years "Nonetheless, this still represents the loss to the EDRF programme of money which could have been used for development projects.
One issue is that sensitivity was shown qualitatively by comparing EDRF in TSE-infected animals and controls.
Decreased synthesis or release of endothelium-derived relaxing factor (EDRF) and increased level of endothelin and acetylcholenesterase (ACE), both of which are strong mediators of vascular tone, have also been implicated (Francavilla et al., 1997; Takahashi, Ghatei, Lam, O'Halloran, & Bloom, 1990).
Besides promoting contraction, serotonin also may contribute to vasodilation by inducing the release of endothelium-derived relaxing factor (EDRF) and prostacyclin from the endothelial cells.
But copper deficiency decreases release of endothelial-derived relaxing factor (EDRF) in test rats' aortas--the largest artery in both humans and animals, says Saari.
The researchers speculate that people with healthy blood vessels react to epinephrine's vessel-constricting message by stepping up production of a natural, nitroglycerine-like substance called endothelium-derived relaxing factor (EDRF).
First recognized for its relaxing properties by Furchgott and his colleague in 1980 as an endothelium-derived relaxing factor (EDRF) [10], it did not take longbefore NO, the first of the gasotransmitters to be studied in detail, was implicated in CNS physiology [11].
At that time, this particle was named by the medical, biological, and biochemical experts as endothelium-derived relaxing factor (EDRF).
2), suggesting the participation of endothelium-derived relaxing factors (EDRF) such as nitric oxide (NO) and prostacyclin ([PGI.sub.2]), as mediators of this pharmacological effect (Vanhoutte 2001).
Wang, "Hydrogen sulfide: a new EDRF," Kidney International, vol.76, no.7, pp.700-704,2009.

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