The practice in fiction, such as in film and television series, of including only one woman in an otherwise male ensemble.

plural of pigeonhole principle

(physics) the principle that classical physics is the limit of quantum physics as quantum numbers approach infinity

(somewhat derogatory) A policy that prohibits building anything that could disturb those who already reside in an area.

(evolutionary biology) The hypothesis that the phylogeny which includes the fewest character changes is the one most likely to be correct.

(linguistics) The idea of using ideograms as phonograms representing the sounds of the words expressed by the original ideograms.

(UK, education) The idea that university places should be available to everybody who qualifies for them by ability and attainment.

(economics) A theory in economics that states that an increase or decrease in income induces a corresponding but magnified change in investment.

(software, object-oriented programming) A software design principle, stated as "Don't call us, we'll call you", that assists in the development of code with high cohesion and low coupling that is easier to debug, maintain and test.

Synonym of Heisenberg uncertainty principle