Reciprocal may refer to:
In mathematics
Multiplicative inverse, in mathematics, the number 1/x, which multiplied by x gives the product 1, also known as a reciprocal Reciprocal polynomial, a polynomial obtained from another polynomial by reversing its coefficients Reciprocal rule, a technique in calculus for calculating derivatives of reciprocal functions Reciprocal spiral, a plane curve Reciprocal averaging, a statistical technique for aggregating categorical data
In science and technology
Reciprocal aircraft heading, 180 degrees (the opposite direction) from a stated heading Reciprocal lattice, a basis for the dual space of covectors, in crystallography Reciprocal length, a measurement used in science Reciprocating engine or piston engine Reciprocating oscillation in physical wave theory Reciprocal cipher
Life sciences and medicine
Hybrid (biology), in genetics, the result of a reciprocal pair of crossings, forming reciprocal hybrids Reciprocal altruism, a form of symbiotic relationship in evolutionary biology Reciprocal cross, a breeding experiment in genetics Sherrington's law of reciprocal innervation in the theory of muscle activation
Social sciences
Reciprocal determinism, a theory in psychology
Linguistics
Reciprocal construction, a construction in which agent and patient are in a mutual relationship
In reciprocal relationships
Reciprocal license, a type of software licenses also known as copyleft Reciprocal link between two web pages Reciprocal obligation, in law, a type of agreement between two individuals Reciprocal Public License (RPL), a software license
See also Reciprocation (disambiguation) Reciprocity (disambiguation)