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Cutting at right angles. Orthotomic circle (Geom.), that circle which cuts three given circles at right angles.

Pertaining to, or having the properties of, an osculatrix; capable of osculation; as, a circle may be osculatory with a curve, at a given point. Osculatory circle. (Geom.) See Osculating circle of a curve, under Circle. -- Osculatory plane (to a curve of double curvature), a plane which passes through three successive…

The part of a target which is beyond the circles surrounding the bull's-eye.

raptorial birds of the family Strigidæ. They have large eyes and ears, and a conspicuous circle of feathers around each eye. They are mostly nocturnal in their habits.

To inclose with pales, or as with pales; to encircle; to encompass; to fence off. [Your isle, which stands] ribbed and paled in With rocks unscalable and roaring waters. Shak.

the extent of nearly a thousand volumes, forming the alloy Pd2H. It is used for graduated circles and verniers, for plating certain silver goods, and somewhat in dentistry. It was so named in 1804 by Wollaston from the asteroid Pallas, which was discovered in 1802. Symbol Pd. Atomic weight, 106.2.

onceived to be formed by the periphery of a semiparabola when its axis is wrapped about a circle; also, any other spiral curve having an analogy to the parabola.

loor or ground, and parallel to each other, -- used for gymnastic exercises. -- Parallel circles of a sphere, those circles of the sphere whose planes are parallel to each other. -- Parallel columns, or Parallels (Printing), two or more passages of reading matter printed side by side, for the purpose of emphasizing t…

t commonly applied to the whole lower floor of a theater, from the orchestra to the dress circle; the pit.

One of the circle of tubercles which form the bur on a deer's antler.

A figure, somewhat hatched-shaped, bounded by a semicircle and two inverted quadrants, and equal in area to the square ABCD inclosed by the chords of the four quadrants. [Written also pelicoid.] Math. Dict.

y means of which the square space in the middle of a building is brought to an octagon or circle to receive a cupola.

Surrounded by a circle of hairs, or projections of any kind.

The circumference of a circle, ellipse, or other figure.

Those who live within a polar circle, whose shadows, during some summer days, will move entirely round, falling toward every point of the compass.

A division of ciliated Infusoria having a circle of cilia around the oral disk and sometimes another around the body. It includes the vorticellas. See Vorticella.

s. Unto the kingdom of perpetual night. Shak. Perpetual feast of nectared sweets. Milton. Circle of perpetual apparition, or occultation. See under Circle. -- Perpetual calendar, a calendar so devised that it may be adjusted for any month or year. -- Perpetual curacy (Ch. of Eng.), a curacy in which all the tithes ar…

ch bears the same relation to the pitch proper, or circular pitch, that the diameter of a circle bears to its circumference; it is sometimes described by the number expressing the quotient obtained by dividing the number of teeth in a wheel by the diameter of its pitch circle in inches; as, 4 pitch, 8 pitch, etc. -- P…

New Jersey and southward, where it flowers in earliest spring. Pixy ring, a fairy ring or circle. [Prov. Eng.] -- Pixy stool (Bot.), a toadstool or mushroom. [Prov. Eng.]

surface, conceived as coinciding with, or containing, some designated astronomical line, circle, or other curve; as, the plane of an orbit; the plane of the ecliptic, or of the equator.