Multiplicative inverse, in mathematics, the number 1/, which multiplied by gives the product 1, also known as a reciprocalReciprocal rule, a technique in calculus for calculating derivatives of reciprocal functionsReciprocal spiral: a mathematical functionReciprocal polynomial, in mathematics
In science and technology
Reciprocal length, a measurement used in scienceReciprocal lattice, a basis for the dual space of covectors, in crystallographyReciprocating oscillation in physical wave theoryReciprocating engine or piston engineReciprocal aircraft heading, 180 degrees (the opposite direction) from a stated heading
Life sciences and medicine
Hybrid (biology), in genetics, the result of reciprocal crossing, also known as a reciprocal hybridReciprocal cross, a breeding experiment in geneticsReciprocal altruism, a form of symbiotic relationship in evolutionary biologySherrington's law of reciprocal innervation in the theory of muscle activation
In social science
Reciprocal determinism, a theory in psychology
In reciprocal relationships
Reciprocal link between two web pagesReciprocal license, a type of software licenses also known as copyleftReciprocal Public License (RPL), a software license
Other uses
Reciprocal (grammar), a relationship between grammatical agents
