Circle vs. Ellipse

Circlenoun

(geometry) A two-dimensional geometric figure, a line, consisting of the set of all those points in a plane that are equally distant from a given point (center).

Circlenoun

A two-dimensional geometric figure, a disk, consisting of the set of all those points of a plane at a distance less than or equal to a fixed distance (radius) from a given point.

Circlenoun

Any thin three-dimensional equivalent of the geometric figures.

Circlenoun

A curve that more or less forms part or all of a circle.

Circlenoun

Orbit.

Circlenoun

A specific group of persons; especially one who shares a common interest.

Circlenoun

(cricket) A line comprising two semicircles of 30 yards radius centred on the wickets joined by straight lines parallel to the pitch used to enforce field restrictions in a one-day match.

Circlenoun

(Wicca) A ritual circle that is cast three times deosil and closes three times widdershins either in the air with a wand or literally with stones or other items used for worship.

Circlenoun

(South Africa) A traffic circle or roundabout.

Circlenoun

(obsolete) Compass; circuit; enclosure.

Circlenoun

(astronomy) An instrument of observation, whose graduated limb consists of an entire circle. When fixed to a wall in an observatory, it is called a mural circle; when mounted with a telescope on an axis and in Y's, in the plane of the meridian, a meridian or transit circle; when involving the principle of reflection, like the sextant, a reflecting circle; and when that of repeating an angle several times continuously along the graduated limb, a repeating circle.

Circlenoun

A series ending where it begins, and repeating itself.

Circlenoun

(logic) A form of argument in which two or more unproved statements are used to prove each other; inconclusive reasoning.

Circlenoun

Indirect form of words; circumlocution.

Circlenoun

A territorial division or district.

Circlenoun

(in the plural) A bagginess of the skin below the eyes from lack of sleep.

Circleverb

(transitive) To travel around along a curved path.

Circleverb

(transitive) To surround.

Circleverb

(transitive) To place or mark a circle around.

Circleverb

(intransitive) To travel in circles.

Circlenoun

A plane figure, bounded by a single curve line called its circumference, every part of which is equally distant from a point within it, called the center.

Circlenoun

The line that bounds such a figure; a circumference; a ring.

Circlenoun

An instrument of observation, the graduated limb of which consists of an entire circle.

Circlenoun

A round body; a sphere; an orb.

Circlenoun

Compass; circuit; inclosure.

Circlenoun

A company assembled, or conceived to assemble, about a central point of interest, or bound by a common tie; a class or division of society; a coterie; a set.

Circlenoun

A circular group of persons; a ring.

Circlenoun

A series ending where it begins, and repeating itself.

Circlenoun

A form of argument in which two or more unproved statements are used to prove each other; inconclusive reasoning.

Circlenoun

Indirect form of words; circumlocution.

Circlenoun

A territorial division or district.

Circleverb

To move around; to revolve around.

Circleverb

To encompass, as by a circle; to surround; to inclose; to encircle.

Circleverb

To move circularly; to form a circle; to circulate.

Circlenoun

ellipse in which the two axes are of equal length; a plane curve generated by one point moving at a constant distance from a fixed point;

Circlenoun

an unofficial association of people or groups;

Circlenoun

something approximating the shape of a circle;

Circlenoun

movement once around a course;

Circlenoun

a road junction at which traffic streams circularly around a central island;

Circlenoun

street names for flunitrazepan

Circlenoun

a curved section or tier of seats in a hall or theater or opera house; usually the first tier above the orchestra;

Circlenoun

any circular or rotating mechanism;

Circleverb

travel around something;

Circleverb

move in circles

Circleverb

be around;

Circleverb

form a circle around;

Circlenoun

a round plane figure whose boundary (the circumference) consists of points equidistant from a fixed point (the centre)

Circlenoun

something in the shape of a circle

Circlenoun

a dark circular mark below each eye caused by illness or tiredness

Circlenoun

a curved upper tier of seats in a theatre or cinema

Circlenoun

short for striking circle

Circlenoun

a group of people with a shared profession, interests, or acquaintances

Circleverb

move all the way around (someone or something), especially more than once

Circleverb

move in a wide loop back towards one's starting point

Circleverb

form a ring around

Circleverb

draw a line around

Circle

A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre; equivalently it is the curve traced out by a point that moves in a plane so that its distance from a given point is constant. The distance between any point of the circle and the centre is called the radius.

Ellipsenoun

(geometry) A closed curve, the locus of a point such that the sum of the distances from that point to two other fixed points (called the foci of the ellipse) is constant; equivalently, the conic section that is the intersection of a cone with a plane that does not intersect the base of the cone.

Ellipseverb

(grammar) To remove from a phrase a word which is grammatically needed, but which is clearly understood without having to be stated.

Ellipsenoun

An oval or oblong figure, bounded by a regular curve, which corresponds to an oblique projection of a circle, or an oblique section of a cone through its opposite sides. The greatest diameter of the ellipse is the major axis, and the least diameter is the minor axis. See Conic section, under Conic, and cf. Focus.

Ellipsenoun

Omission. See Ellipsis.

Ellipsenoun

The elliptical orbit of a planet.

Ellipsenoun

a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it;

Ellipse

In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.