circ- +

(Latin: circle [a ring; wheel], round)

circa
Used before a date to indicate that it is approximate or that it is an estimated date; abbreviated as: ca, ca., c., c, cir., circ.
circadian (adjective), more circadian, most circadian
Descriptive of a physiological activity that occurs approximately every twenty-four hours, or the rhythm of such activity: The doctor told Raymond that his circadian rhythm referred to his cycle of activities; including both his daily functioning (eating, sleeping, etc.) and his body's chemistry (changes in blood pressure, urine production, etc.) all of which usually last for and are repeated about every 24 hours.
circle
1. A two-dimensional geometric figure formed with a curved line surrounding a center point, every point of the line being an equal distance from the center point.
2. A circular course, circuit, or orbit: a satellite's circle around the earth.
3. A curved section or tier of seats in a theater.
4. A process, series, or process that finishes at its starting point or continuously repeats itself; a cycle.
5. A group of people sharing a common interest, profession, activity, social background, or achievement: well-known in artistic circles.
6. A territorial or administrative division, especially of a province, in some European countries.
circled
1. Surrounded; encompassed; inclosed.
2. Having the form of a circle; round.
circlet
1. A decorated metal band worn around the head.
2. A small circle; especially, a circular ornament.
circling
1. To make or to form a circle; to enclose.
2. To move around in a circle.
A boy is circling his model aircraft.

A boy is having fun as he sees his motor-driven model airplane circling around and around.

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circuitous (adjective), more circuitous, most circuitous
1. Pertaining to or taking a roundabout, lengthy course: The speaker spoke in a circuitous manner which ended in multitudinous arguments.
2. Regarding a deviation from a straight course or a direct procedure: Betty's father took a circuitous drive to avoid the rush-hour traffic.
Indirect and roundabout.
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Not direct, but devious in responding.
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circular
1. Relating to a circle.
2. Shaped like or nearly like a circle; round.
3. Moving in or forming a circle.
4. Circuitous; roundabout: "We took a circular route to work."
5. Using a premise to prove a conclusion that in turn is used to prove the premise: "He was making a circular argument."
6. Defining one word in terms of another that is itself defined in terms of the first word.
7. Addressed or distributed to a large number of people.
circularity
1. The roundness of a two-dimensional figure.
2. The quality or fact of being circular in shape.
3. The indirect and complicated nature of something; such as, a method or route.
4. The illogical nature of something; such as, an argument or piece of reasoning.
circularization
Circulating printed notices as a means of advertising.
circularize
1. To publicize with circulars.
2. To canvass or to take a poll using a questionnaire.
circularizer
1. Anyone who publicizes with circulars.
2. Someone who canvasses or takes a poll using a questionnaire.
circulate, circulates; circulated, circulating (verbs)
1. To move in a circle or to circuit; to move or to pass through a circuit back to the starting point: "Blood circulates throughout the body."
2. To pass from place to place, from person to person, etc.
3. To be distributed or sold; especially, over a wide area.
4. In libraries, a reference to books and other materials which are available for borrowing by people from a library for a specified period of time.
5. To cause to pass from place to place, person to person, etc.; to disseminate; to distribute: "He just kept on circulating the rumor."
circulated (adjective)
1. Something that is moved freely around an object or an area.
2. Distributed or passed from person to person or from place to place.
circulating (adjective)

Related "around, round, surrounding" units: ambi-; ampho-; circum-; cyclo-, -cycle; gyro-; peri-.