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Definitions for ReciprocalrÉªËsÉªp rÉ kÉl. reciprocal(noun) something (a term or expression or concept) that has a reciprocal relation to something else. risk is the reciprocal of safety. multiplicative inverse, reciprocal(noun)
So, the reciprocal of x is 1/x, and the reciprocal of 1/x is 1/(1/x) â¦ = x. (Taking the reciprocal of the reciprocal of a number yields the original number.)   Examples:   * The reciprocal of 2 is 1/2.  * The reciprocal of 1/2 is 1/(1/2) = 2.  * The reciprocal of 3/4 is 1/(3/4) = 4/3. 4 people found this useful.