Search the Dictionary

nds one and but one point in the other, and vise versa. Thus, a tangent line rolling on a circle cuts two fixed tangents of the circle in two sets of points that are homographic.

A circle, or combination of circles, of thin whalebone, metal, or other elastic material, used for expanding the skirts of ladies' dresses; crinoline; -- used chiefly in the plural. Though stiff with hoops, and armed with ribs of whale. Pope.

s introduced, while the gases are retained. -- Hopper boy, a rake in a mill, moving in a circle to spread meal for drying, and to draw it over an opening in the floor, through which it falls. -- Hopper closet, a water-closet, without a movable pan, in which the receptacle is a funnel standing on a draintrap. -- Hopp…

our; hourly; ephemeral. Horary, or soon decaying, fruits of summer. Sir T. Browne. Horary circles. See Circles.

The circle which bounds that part of the earth's surface visible to a spectator from a given point; the apparent junction of the earth and sky. And when the morning sun shall raise his car Above the border of this horizon. Shak. All the horizon round Invested with bright rays. Milton.

escent; esp., an extremity or cusp of the moon when crescent-shaped. The moon Wears a wan circle round her blunted horns. Thomson.

anonical hours. See under Canonical. -- Hour angle (Astron.), the angle between the hour circle passing through a given body, and the meridian of a place. -- Hour circle. (Astron.) (a) Any circle of the sphere passing through the two poles of the equator; esp., one of the circles drawn on an artificial globe through…

A twelfth part of the heavens, as divided by six circles intersecting at the north and south points of the horizon, used by astrologers in noting the positions of the heavenly bodies, and casting horoscopes or nativities. The houses were regarded as fixed in respect to the horizon, and numbered from the one at the east…

to the hyperbola corresponding to those which sines, cosines, tangents, etc., have to the circle; and hence, called hyperbolic sines, hyperbolic cosines, etc. -- Hyperbolic logarithm. See Logarithm. -- Hyperbolic spiral (Math.), a spiral curve, the law of which is, that the distance from the pole to the generating po…

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.

A curve, traced by a point in the radius, or radius produced, of a circle which rolls upon the concave side of a fixed circle. See Hypocycloid, Epicycloid, and Trochoid.

ay rather, man's as perfect as he ought. Pope. Imperfect arch, an arch of less than a semicircle; a skew arch. -- Imperfect cadence (Mus.), one not ending with the tonic, but with the dominant or some other chord; one not giving complete rest; a half close. -- Imperfect consonances (Mus.), chords like the third and s…

The center of the circle inscribed in a triangle.

To clasp within; to hold fast to; to embrace or encircle. [Written also enclasp.] The flattering ivy who did ever see Inclasp the huge trunk of an aged tree. F. Beaumont.

s magnetic force to the plane of the horizon; -- called also inclination compass, and dip circle.

onal of a square are incommensurable with each other; the diameter and circumference of a circle are incommensurable. They are quantities incommensurable. Burke. -- In`com*men"su*ra*ble*ness, n. -- In`com*men"su*ra*bly, adv.

e, or one with circular rows of holes differently spaced; used in machines for graduating circles, cutting gear teeth, etc. -- Index prohibitorius Etym: [L.], or Prohibitory index (R. C. Ch.), a catalogue of books which are forbidden by the church to be read; the index expurgatorius Etym: [L.], or expurgatory index, i…

y, parallel lines or planes are sometimes treated as lines or planes meeting at infinity. Circle at infinity, an imaginary circle at infinity, through which, in geometry of three dimensions, every sphere is imagined to pass. -- Circular points at infinity. See under Circular.

To encircle to gird; to engirt. The wreath is ivy that ingirts our beams. Drayton.

intelligence. Milton. The great Intelligences fair That range above our mortal state, In circle round the blessed gate, Received and gave him welcome there. Tennyson. Intelligence office, an office where information may be obtained, particularly respecting servants to be hired.