A technical mathematical object which bears the same resemblance to binary relations as categories do to functions and sets.
Allegory
See also
CategoryExplore with Wolfram|Alpha
References
Freyd, P. J. and Scedrov, A. Categories, Allegories. Amsterdam, Netherlands: North-Holland, 1990.Referenced on Wolfram|Alpha
AllegoryCite this as:
Weisstein, Eric W. "Allegory." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Allegory.html