(physics) The structure of spectra characterised by the splitting of lines due to relativistic effects

(economics) The offering of loans by the International Monetary Fund and the World Bank to countries experiencing economic crisis, with the aim of adjusting their economic structure, improving international competitiveness, and restoring the balance of payments.

plural of structural adjustment

plural of algebraic structure

plural of capital structure

plural of quaternary structure

Alternative form of fine-structure constant

(electrodynamics) The fundamental physical value α, presumed to be constant, that characterizes the strength of the electromagnetic force.

(physics) Any material that confines electrons in such a small space that their wavelike behaviour becomes important and their properties are strongly modified by quantum mechanical effects; examples include atoms and layered semiconductor devices.

(management) A global hierarchy that represents different levels of responsibilities within a project or enterprise.