**Technology / Home Audio / Inverse Square Law:** In mathematics, the law that states that in the absence of reflective surfaces, sound pressure (or light) falls off at a rate inverse to the square of the distance from its source. In other words, every time the distance from the sound source is doubled, the sound pressure level is reduced by a factor of 4, or 12 db.

**Law Noun Synonyms**: principle, proposition, theory, theorem, formula, axiom, deduction, corollary, postulate, conclusion, inference

**Law Verb Synonyms**: rule, regulation, ordinance, statute, act, enactment, by-law, measure, edict, decree, order, directive, injunction, command, commandment, canon, mandate, ukase

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**Square Noun Synonyms**: equilateral, quadrangular, rectangular, right-angled, quadrilateral, four-sided, cubic, cubed, six-sided, boxy

**Square Verb Synonyms**: equal, on a par, even, on equal terms, settled, balanced

**Square Adjective Synonyms**: healthful, healthy, nutritious, substantial, solid, full, generous, satisfying, filling, unstinting

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Science / Weather / Pounds Per Square Inch (PSI): A unit for measuring pressure. One PSI equals the pressure resulting from a force of one pound force acting over an area of one square inch. MORE

Business / Finance / R Square (R2): Square of the correlation coefficient. The proportion of the variability in one series that can be explained by the variability of one or more other series a regression model. A measure of the quality MORE

Business / Agriculture / Permanent Law: Legislation that would be in force in the absence of all temporary or short-term laws (e.g., farm bills). The Agricultural Adjustment Act of 1938, the Agricultural Act of 1949, and the Commodity Credi MORE