Circular is a basic geometric shape such as a Circle.


Circular may also refer to:


  • Circular note, a document request by a bank to its foreign correspondents to pay a specified sum of money to a named person
  • Flyer (pamphlet), sometimes referred to as a circular, is a notice sent out in large quantities
  • Government circular, a written statement of government policy
  • Circular letter (disambiguation), multiple meanings
  • List of circulars, multiple documents

Travel and transportation


  • Circular Quay ferry wharf, the complex of the main commuter wharves in Circular Quay in Sydney, Australia
  • Circular Quay railway station, a CityRail station located in Sydney, Australia and is situated on the City Circle line
  • Circular Quay, a location in Sydney, Australia
  • Penha Circular, a suburb in the north of Rio de Janeiro
  • Ponte Pedonal Circular (Aveiro), a bridge in Portugal located in Aveiro District
  • Circular Head Council, a Local Government Area of Tasmania
  • Circular Kinopanorama a cinema in Moscow which plays a cinema presentation on a circular screen with a horizontal 360° view


  • Circular fibers, also known as the Iris sphincter muscle, is a muscle in the part of the eye called the iris
  • Circular folds, large valvular flaps projecting into the lumen of the bowel
  • Circular sulcus of insula, a deep circular sulcus surrounds the insula



  • Circular Tower, one of the three Azrieli center skyscrapers located in Tel Aviv, Israel
  • Circular window, a feature of classical architecture since the 16th century
  • Circular rampart, an embankment built in the shape of a circle


  • Circular bacterial chromosome, the bacterial chromosome contained in a circular DNA molecule
  • Circular crab, a medium-sized crab found in the Mediterranean Sea and other places
  • Circular DNA, a form of DNA that is found in bacteria and archaea
  • Circular saw shell, a large sea snail of the family Turbinidae
  • Circular stingaree, is a species of fish in the Urolophidae family that is endemic to Australia

Computer sciences and programming

  • Circular buffer, a data structure that uses a single, fixed-size buffer as if it were connected end-to-end
  • Circular convolution
  • Circular dependency, in software engineering, a relation between two or more modules which either directly or indirectly depend on each other to function properly
  • Circular list, a linked list in which all nodes are linked in a continuous circle without using null
  • Circular wait, one of the conditions necessary for deadlock to occur
  • Meta-circular evaluator, a special case of a self-interpreter in which the existing facilities of the parent interpreter are directly applied to the source code being interpreted


  • Circle, a basic geometric shape
  • Circular algebraic curve, a type of plane algebraic curve
  • Circular cone, a three-dimensional geometric shape that tapers smoothly from a circular base to the apex
  • Circular cylinder, a basic curvilinear geometric shapes
  • Circular mil, a unit of area equal to the area of a circle with a diameter of one thousandth of an inch
  • Circular paraboloid, an elliptic paraboloid
  • Circular points at infinity, a term used in projective geometry
  • Circular sector, is the portion of a circle enclosed by two radii and an arc
  • Circular segment, the area of a circle which is "cut off" from the rest of the circle by a secant or a chord
  • Circular surface, a term used in differential geometry
  • Trigonometric functions, also called circular functions, are functions of an angle

Graph theory

  • Circular coloring, a refinement of usual graph coloring
  • Circular graph, a graph that consists of some number of vertices connected in a closed chain
  • Circular-arc graph, a circular-arc graph is the intersection graph of a set of arcs on the circle

General Mathematics

  • Circular coordinates, a two-dimensional coordinate system in which each point on a plane is determined by a distance from a fixed point and an angle from a fixed direction
  • Circular number, a number whose square "ends" in the same digits as number itself
  • Circular ordering, a term used in combinatorial mathematics
  • Circular permutation, a permutation built from one or more sets of elements in cyclic order
  • Circular shift, in combinatorial mathematics, the operation of rearranging the entries in a tuple
  • Mean of circular quantities, a mean of circular quantities


  • Circular cause and consequence, a logical fallacy where the consequence of the phenomenon is claimed to be its root cause
  • Circular definition, a definition that assumes a prior understanding of the term being defined
  • Circular reasoning, a logical fallacy in which the proposition to be proved is assumed in one of the premises
  • Circular reference, a series of references where the last object references the first, resulting in a closed loop
  • Circular reporting, (also known as “false confirmation”), a situation where a piece of information appears to come from multiple independent sources, but in fact is coming from only one source


  • Circular dichroism, refers to the differential absorption of left and right circularly polarized light
  • Circular ensemble, in the theory of random matrices, it is a measures on spaces of unitary matrices
  • Circular motion, a rotation along a circle
  • Circular orbit, the orbit of any point of an object rotating around a fixed axis
  • Circular polarization, a polarization where the tip of the electric field vector describes a circle as time progresses.
  • Circular polarizer, used to create circularly polarized light
  • Circular symmetry, in mathematical physics applies to a 2-dimensional field which can be expressed as a function of distance from a central point only
  • Circular wavenumber, in physical sciences, a property of a wave proportional to the reciprocal of the wavelength
  • Uniform circular motion and Non-uniform circular motion, terms used to describe the motion of a body traversing a circular path


  • Circular normal distribution, in probability theory and directional statistics, a continuous probability distribution on the circle
  • Circular uniform distribution, in probability theory and directional statistics, a probability distribution on the unit circle whose density is uniform for all angles
  • Circular error probable, an intuitive measure of a weapon system's accuracy

Entertainment, fictional literature and music

  • Circular (album), a studio album released by Spanish singer Vega in 2006
  • Circular Reasoning Records, a sub-label of the independent record label Charnel Music
  • Circular temperament, a type of tempered tuning described in 20th-century music theory
  • Circular Time, a British audio drama based on the long-running science fiction television series Doctor Who
  • The Circular Ruins, a fantasy short story by Argentine writer and poet Jorge Luis Borges
  • Circular chain dance, also called a Circle dance, a style of traditional dance usually done in a circle without partners


  • Circular Head Football Association, an Australian rules football competition held in Tasmania, Australia
  • Circular Quay (horse), a thoroughbred racehorse who was a 2007 Kentucky Derby contender
  • Circular saw bench, a woodworking tool that consists of a circular saw blade, mounted on an arbor, that is driven by an electric motor
  • Circular saw, a spinning tool with saw teeth used for cutting wood or other materials
  • Circular transactions controversy, a 2008 Irish accounting scandal that triggered series of incidents which led to the eventual nationalisation of the Anglo Irish Bank
  • Intermediate circular orbit, is the region of space around the Earth above low Earth orbit and below geostationary orbit
  • Circular gear, a rotating machine part having cut teeth, or cogs, which mesh with another toothed part in order to transmit torque.
  • Semi-circular kick, a form of roundhouse kick used in kick-boxing

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Look at other dictionaries:

  • Circular — puede referirse a: Relativo al círculo. Documento preparado para comunicar un mensaje idéntico a un grupo (círculo) de personas o al público en general. En geometría y otras ramas de matemática: Sector circular. Segmento circular. Corona circular …   Wikipedia Español

  • Circular — Cir cu*lar, a. [L. circularis, fr. circulus circle: cf. F. circulaire. See {Circle}.] [1913 Webster] 1. In the form of, or bounded by, a circle; round. [1913 Webster] 2. repeating itself; ending in itself; reverting to the point of beginning;… …   The Collaborative International Dictionary of English

  • circular — CIRCULÁR, Ă, circulari, e, adj., s.f. 1. adj. În formă de cerc; care descrie un cerc. ♢ Ferăstrău circular (şi substantivat, n.) = ferăstrău mecanic cu pânza în forma unui disc dinţat, care taie învârtindu se în jurul propriului ax. ♦ (Adverbial) …   Dicționar Român

  • Circular 10/65 — was a document issued by the Department of Education and Science (DES) requesting Local Education Authorities (LEAs) in England and Wales to begin converting their secondary schools to the Comprehensive System. For most of England and Wales, it… …   Wikipedia

  • circular — verbo intransitivo 1. Moverse (una cosa o una persona) por un circuito o camino: El metro circula hoy con normalidad. El agua ya circula por las cañerías. En el parque circulan muchos niños y viejos. 2. Moverse (una persona) en una dirección:… …   Diccionario Salamanca de la Lengua Española

  • circular — cir‧cu‧lar [ˈsɜːklə ǁ ˈsɜːrkjlər] noun [countable] MARKETING an official letter or advertisement sent to a lot of people: • The government s instructions were issued to local authorities via circulars. • a circular letter sent out by one… …   Financial and business terms

  • Circular — Cir cu*lar, n. [Cf. (for sense 1) F. circulaire, lettre circulaire. See {Circular}, a.] [1913 Webster] 1. A circular letter, or paper, usually printed, copies of which are addressed or given to various persons; as, a business circular. [1913… …   The Collaborative International Dictionary of English

  • circular — index dispatch (message), notice (announcement) Burton s Legal Thesaurus. William C. Burton. 2006 …   Law dictionary

  • circular — Se conjuga como: amar Infinitivo: Gerundio: Participio: circular circulando circulado     Indicativo   presente imperfecto pretérito futuro condicional yo tú él, ella, Ud. nosotros vosotros ellos, ellas, Uds. circulo circulas circula circulamos… …   Wordreference Spanish Conjugations Dictionary

  • circular — em ou por circular nas (pelas) ruas da cidade …   Dicionario dos verbos portugueses

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