Reciprocal 54086 209004895 2008-04-29T14:51:52Z Lenoxus 986499 streamline down to non-piped, non-redirecting links; rm redundant math definition at top {{wiktionarypar|reciprocal}} '''Reciprocal''' may refer to: *[[Multiplicative inverse]], in mathematics, the number 1/''x'', which multiplied by ''x'' gives the product 1, also known as a ''reciprocal'' *[[Reciprocal rule]], a technique in calculus for calculating derivatives of reciprocal functions *[[Reciprocal lattice]], a basis for the dual space of covectors, in crystallography *[[Reciprocal (grammar)]], a relationship between grammatical agents *[[Reciprocal determinism]], a theory in psychology *[[Reciprocal altruism]], a form of symbiotic relationship in evolutionary biology *[[Reciprocal cross]], a breeding experiment in genetics *[[Hybrid (biology)]], in genetics, the result of reciprocal crossing, also known as a ''reciprocal hybrid'' ===See also=== *[[Reciprocity]] {{disambig}}