A psychometric model for analysis of categorical data, such as answers to a questionnaire, as a function of the trade-off between (a) the respondent's abilities, attitudes or personality traits and (b) the item difficulty.

A program designed to reduce domestic violence against women, based on feminist theory positing that such violence is the result of patriarchal ideology.

(astronomy) A scenario for the dynamical evolution of the Solar System, proposing the migration of the giant planets from an initial compact configuration into their present positions, long after the dissipation of the initial protoplanetary gas disk.

The combating of prostitution by criminalizing the buyer, rather than the seller, of sexual services.

(chemistry) A molecular model of a chemical substance, displaying the three-dimensional position of the atoms (as spheres) and the bonds between them (as connecting rods).

plural of model solution

plural of model number

An aircraft made to a smaller scale, either as a static (non-flying) model, or built to fly with the aid of an engine or electric motor, and controlled by radio from the ground.

(shipbuilding) A scale model of a ship to be built, showing the vessel's water line. / (shipbuilding) A simplified model of a ship with flat sides.

(biology) Any organism (e.g. the fruit fly) that has been extensively studied as an example of many others, and from which general principles may be established