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

(obsolete) elementary

(software, object-oriented programming) Synonym of Law of Demeter

(software, user interface, design) A principle that the design should match the user's experience, expectations, and mental models.

(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.

present participle of principiate

simple past tense and past participle of principiate

present participle of principle

(logic) The principle or axiom of classical logic and some other logical systems stating that if a contradiction or a false proposition is proven to be true, then it proves that everything is true. In symbols: ⊥→P

(biochemistry, archaic) Any of a class of substances found ready-formed in animal and vegetable tissues, and separable by chemical analysis, such as albumin, sugar, collagen, fat, etc.