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more about reciprocal
## reciprocal |

4 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Inverse \In*verse"\, a. [L. inversus p. p. of invertere: cf F. inverse. See {Invert}.] 1. Opposite in order relation, or effect; reversed; inverted; reciprocal; -- opposed to {direct}. 2. (Bot.) Inverted; having a position or mode of attachment the reverse of that which is usual. 3. (Math.) Opposite in nature and effect; -- said with reference to any two operations, which when both are performed in succession upon any quantity, reproduce that quantity; as multiplication is the inverse operation to division. The symbol of an inverse operation is the symbol of the direct operation with -1 as an index. Thus sin-1 x means the arc whose sine is x. {Inverse figures} (Geom.), two figures, such that each point of either figure is inverse to a corresponding point in the order figure. {Inverse points} (Geom.), two points lying on a line drawn from the center of a fixed circle or sphere, and so related that the product of their distances from the center of the circle or sphere is equal to the square of the radius. {Inverse}, or {Reciprocal}, {ratio} (Math.), the ratio of the reciprocals of two quantities. {Inverse}, or {Reciprocal, {proportion}, an equality between a direct ratio and a reciprocal ratio; thus 4 : 2 : : 1/3 : 1/6, or 4 : 2 : : 3 : 6, inversely. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Reciprocal \Re*cip"ro*cal\, n. 1. That which is reciprocal to another thing Corruption is a reciprocal to generation. --Bacon. 2. (Arith. & Alg.) The quotient arising from dividing unity by any quantity; thus 3/4 is the reciprocal of 4; 1/(a + b) is the reciprocal of a + b. The reciprocal of a fraction is the fraction inverted, or the denominator divided by the numerator. From Webster's Revised Unabridged Dictionary (1913) [web1913]: Reciprocal \Re*cip"ro*cal\, a. [L. reciprocus; of unknown origin.] 1. Recurring in vicissitude; alternate. 2. Done by each to the other interchanging or interchanged; given and received; due from each to each mutual; as reciprocal love; reciprocal duties. Let our reciprocal vows be remembered. --Shak. 3. Mutually interchangeable. These two rules will render a definition reciprocal with the thing defined. --I. Watts. 4. (Gram.) Reflexive; -- applied to pronouns and verbs, but sometimes limited to such pronouns as express mutual action 5. (Math.) Used to denote different kinds of mutual relation; often with reference to the substitution of reciprocals for given quantities. See the Phrases below. {Reciprocal equation} (Math.), one which remains unchanged in form when the reciprocal of the unknown quantity is substituted for that quantity. {Reciprocal figures} (Geom.), two figures of the same kind (as triangles, parallelograms, prisms, etc.), so related that two sides of the one form the extremes of a proportion of which the means are the two corresponding sides of the other in general, two figures so related that the first corresponds in some special way to the second and the second corresponds in the same way to the first {Reciprocal proportion} (Math.), a proportion such that of four terms taken in order the first has to the second the same ratio which the fourth has to the third or the first has to the second the same ratio which the reciprocal of the third has to the reciprocal of the fourth Thus 2:5: :20:8 form a reciprocal proportion, because 2:5: :1/20:1/8. {Reciprocal quantities} (Math.), any two quantities which produce unity when multiplied together. {Reciprocal ratio} (Math.), the ratio between the reciprocals of two quantities; as the reciprocal ratio of 4 to 9 is that of 3/4 to 1/9. {Reciprocal terms} (Logic), those terms which have the same signification, and consequently, are convertible, and may be used for each other Syn: Mutual; alternate. Usage: {Reciprocal}, {Mutual}. The distinctive idea of mutual is that the parties unite by interchange in the same act as a mutual covenant; mutual affection, etc The distinctive idea of reciprocal is that one party acts by way of return or response to something previously done by the other party; as a reciprocal kindness; reciprocal reproaches, etc Love is reciprocal when the previous affection of one party has drawn forth the attachment of the other To make it mutual in the strictest sense the two parties should have fallen in love at the same time; but as the result is the same the two words are here used interchangeably. The ebbing and flowing of the tide is a case where the action is reciprocal, but not mutual. From WordNet r 1.6 [wn]: reciprocal adj : concerning each of two or more persons or things especially given or done in return; "reciprocal aid"; "reciprocal trade"; "reciprocal respect"; "reciprocal privileges at other clubs" [ant: {nonreciprocal}] n : (math) one of a pair of numbers whose product is 1: the reciprocal of 2/3 is 3/2; the inverse of 7 is 1/7 [syn: {inverse}]

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