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ving no example or similar case; being without precedent; unprecedented; unparalleled. "A revolution . . . unexampled for grandeur of results." De Quincey.

A section or part of a cylinder, cone, or other solid of revolution, cut off by a plane oblique to the base; -- so called from its resemblance to the hoof of a horse.

nerves. Why should I then unhinge my brains, ruin my mind South. His sufferings, nay the revolutions of his fate, had not in the least unhinged his mind. Walpole.

about 1,800,000,000 miles from the sun, about 36,000 miles in diameter, and its period of revolution round the sun is nearly 84 of our years.

of a patron is to oust or dispossess him. Alack, thou dost usurp authority. Shak. Another revolution, to get rid of this illegitimate and usurped government, would of course be perfectly justifiable. Burke.

a pedal or pedals connected with the axle of one or more of the wheels, and causing their revolution. They are made in many forms, with two, three, or four wheels. See Bicycle, and Tricycle.

The quality or power of turning; revolution; rotation. [R.] Locke. I hardly believe he hath from elder times unknown the verticity of the loadstone. Sir T. Browne.

Irregular change; revolution; mutation. This man had, after many vicissitudes of fortune, sunk at last into abject and hopeless poverty. Macaulay.

a windmill sail, the obliquity of the sail, or the angle which it makes with its plane of revolution. -- Weather report, a daily report of meteorological observations, and of probable changes in the weather; esp., one published by government authority. -- Weather spy, a stargazer; one who foretells the weather. [R.]…

A turn revolution; rotation; compass. According to the common vicissitude and wheel of things, the proud and the insolent, after long trampling upon others, come at length to be trampled upon themselves. South. [He] throws his steep flight in many an aëry wheel. Milton. A wheel within a wheel, or Wheels within wheels,…

A friend and supporter of the American Revolution; -- opposed to Tory, and Royalist.

The time of the apparent revolution of the sun trough the ecliptic; the period occupied by the earth in making its revolution around the sun, called the astronomical year; also, a period more or less nearly agreeing with this, adopted by various nations as a measure of time, and called the civil year; as, the common lu…

Accomplished in a year; as, the yearly circuit, or revolution, of the earth. Shak.

the surface of a sphere included between two parallel planes; the portion of a surface of revolution included between two planes perpendicular to the axis. Davies & Peck (Math. Dict.)