(quantum mechanics) An effective field theory describing a vector field with a vacuum expectation value that spontaneously breaks Lorentz symmetry.

plural of scale model

(economics) An economic model that ascribes the periodic price fluctuations in certain types of market to cyclical supply and demand where the amount produced must be chosen before prices are observed, and producers' expectations about prices are assumed to be based on observations of previous prices.

plural of cobweb model

(dated) A dairy or dairy farm where the milk will be pasteurised and especial care is taken with cleanliness and hygiene.

plural of hand model

A person employed to display or pose their hands, especially in advertisements.

plural of bootstrap model

(physics) Any of a class of theories that use very general consistency criteria to determine the form of a quantum theory from some assumptions on the spectrum of particles.

plural of model railway