# Circular

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**Circular definition**— A circular definition is one that uses the term(s) being defined as a part of the definition or assumes a prior understanding of the term being defined. Either the audience must already know the meaning of the key term(s), or the definition is… …122

**Circular shift**— In combinatorial mathematics, a circular shift is the operation of rearranging the entries in a tuple, either by moving the final entry to the first position, while shifting all other entries to the next position, or by performing the inverse… …123

**Circular dependency**— In software engineering, a circular dependency is a relation between two or more modules which either directly or indirectly depend on each other to function properly. Contents 1 Overview 2 Problems of circular dependencies 3 Causes and solutions …124

**Circular algebraic curve**— In geometry, a circular algebraic curve is a type of plane algebraic curve determined by an equation F(x, y) = 0, where F is a polynomial with real coefficients and the highest order terms of F form a polynomial divisible by… …125

**Circular delivery company**— An 1867 one farthing stamp from the Liverpool Circular Delivery Company. In postal history, a circular delivery company was a type of company which operated in Great Britain between 1865 and 1869 to deliver circulars and other printed matter at… …126

**Circular uniform distribution**— In probability theory and directional statistics, a circular uniform distribution is a probability distribution on the unit circle whose density is uniform for all angles. Contents 1 Description 2 Distribution of the mean 3 Entropy …127

**Circular orbit**— For other meanings of the term orbit , see orbit (disambiguation) A circular orbit is the orbit at a fixed distance around any point by an object rotating around a fixed axis. Below we consider a circular orbit in astrodynamics or celestial… …128

**Circular Quay railway station**— Circular Quay …