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Circination :: Circination (n.) A circle; a concentric layer.

Semicircle :: Semicircle (n.) A semicircumference.

Unity :: Unity (n.) Any definite quantity, or aggregate of quantities or magnitudes taken as one, or for which 1 is made to stand in calculation; thus, in a table of natural sines, the radius of the circle is regarded as unity..

Stentor :: Stentor (n.) Any species of ciliated Infusoria belonging to the genus Stentor and allied genera, common in fresh water. The stentors have a bell-shaped, or cornucopia-like, body with a circle of cilia around the spiral terminal disk. See Illust. under Heterotricha..

Declination :: Declination (n.) The arc of the horizon, contained between the vertical plane and the prime vertical circle, if reckoned from the east or west, or between the meridian and the plane, reckoned from the north or south..

Intuition :: Intuition (n.) Direct apprehension or cognition; immediate knowledge, as in perception or consciousness; -- distinguished from mediate knowledge, as in reasoning; as, the mind knows by intuition that black is not white, that a circle is not a square, that three are more than two, etc.; quick or ready insight or apprehension..

Circumferentor :: Circumferentor (n.) A surveying instrument, for taking horizontal angles and bearings; a surveyor's compass. It consists of a compass whose needle plays over a circle graduated to 360¡, and of a horizontal brass bar at the ends of which are standards with narrow slits for sighting, supported on a tripod by a ball and socket joint..

White-eye :: White-eye (n.) Any one of several species of small Old World singing of the genus Zosterops, as Zosterops palpebrosus of India, and Z. c/rulescens of Australia. The eyes are encircled by a ring of white feathers, whence the name. Called also bush creeper, and white-eyed tit..

Equator :: Equator (n.) The great circle of the celestial sphere, coincident with the plane of the earth's equator; -- so called because when the sun is in it, the days and nights are of equal length; hence called also the equinoctial, and on maps, globes, etc., the equinoctial line..

Hypocycloid :: Hypocycloid (n.) A curve traced by a point in the circumference of a circle which rolls on the concave side in the fixed circle. Cf. Epicycloid, and Trochoid..

Circular :: Circular (a.) In the form of, or bounded by, a circle; round..

Enchase :: Enchase (v. t.) To incase or inclose in a border or rim; to surround with an ornamental casing, as a gem with gold; to encircle; to inclose; to adorn..

Encyclopaedia :: Encyclopaedia (n.) The circle of arts and sciences; a comprehensive summary of knowledge, or of a branch of knowledge; esp., a work in which the various branches of science or art are discussed separately, and usually in alphabetical order; a cyclopedia..

Subcontrary :: Subcontrary (a.) Having, or being in, a contrary order; -- said of a section of an oblique cone having a circular base made by a plane not parallel to the base, but so inclined to the axis that the section is a circle; applied also to two similar triangles when so placed as to have a common angle at the vertex, the opposite sides not being parallel..

Roundlet :: Roundlet (n.) A little circle.

Nimbus :: Nimbus (n.) A circle, or disk, or any indication of radiant light around the heads of divinities, saints, and sovereigns, upon medals, pictures, etc.; a halo. See Aureola, and Glory, n., 5..

Biquintile :: Biquintile (n.) An aspect of the planets when they are distant from each other by twice the fifth part of a great circle -- that is, twice 72 degrees..

Circumcenter :: Circumcenter (n.) The center of a circle that circumscribes a triangle.

Roundel :: Roundel (a.) Anything having a round form; a round figure; a circle.

Sunburning :: Sun-burner (n.) A circle or cluster of gas-burners for lighting and ventilating public buildings.

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