Planet wheel
Planet Plan"et, n. [OE. planete, F. plan[`e]te, L. planeta, fr. Gr. ?, and ? a planet; prop. wandering, fr. ? to wander, fr. ? a wandering.] 1. (Astron.) A celestial body which revolves about the sun in an orbit of a moderate degree of eccentricity. It is distinguished from a comet by the absence of a coma, and by having a less eccentric orbit. See {Solar system}. [1913 Webster]

Note: The term planet was first used to distinguish those stars which have an apparent motion through the constellations from the fixed stars, which retain their relative places unchanged. The inferior planets are Mercury and Venus, which are nearer to the sun than is the earth; the superior planets are Mars, the asteroids, Jupiter, Saturn, Uranus, and Neptune, which are farther from the sun than is the earth. Primary planets are those which revolve about the sun; secondary planets, or moons, are those which revolve around the primary planets as satellites, and at the same time revolve with them about the sun. [1913 Webster]

2. A star, as influencing the fate of a men. [1913 Webster]

There's some ill planet reigns. --Shak. [1913 Webster]

{Planet gear}. (Mach.) See {Epicyclic train}, under {Epicyclic}.

{Planet wheel}, a gear wheel which revolves around the wheel with which it meshes, in an epicyclic train. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • planet wheel — n. a gear that meshes with and revolves around another gear in an epicyclic train * * * …   Universalium

  • planet wheel — n. a gear that meshes with and revolves around another gear in an epicyclic train …   English World dictionary

  • planet wheel — noun an outer gear that revolves about a central sun gear of an epicyclic train • Syn: ↑planetary gear, ↑epicyclic gear, ↑planet gear • Hypernyms: ↑gear, ↑gear wheel, ↑geared wheel, ↑cogwheel …   Useful english dictionary

  • planet wheel — noun Date: 1827 a gear wheel that revolves around the wheel with which it meshes in an epicyclic train …   New Collegiate Dictionary

  • planet wheel — See planet gear …   Dictionary of automotive terms

  • planet wheel — /ˈplænət wil/ (say planuht weel) noun any of the wheels in an epicyclic train, whose axes revolve round the common centre …   Australian English dictionary

  • Planet — Plan et, n. [OE. planete, F. plan[ e]te, L. planeta, fr. Gr. ?, and ? a planet; prop. wandering, fr. ? to wander, fr. ? a wandering.] 1. (Astron.) A celestial body which revolves about the sun in an orbit of a moderate degree of eccentricity. It… …   The Collaborative International Dictionary of English

  • Planet gear — Planet Plan et, n. [OE. planete, F. plan[ e]te, L. planeta, fr. Gr. ?, and ? a planet; prop. wandering, fr. ? to wander, fr. ? a wandering.] 1. (Astron.) A celestial body which revolves about the sun in an orbit of a moderate degree of… …   The Collaborative International Dictionary of English

  • planet gear — noun an outer gear that revolves about a central sun gear of an epicyclic train • Syn: ↑planetary gear, ↑epicyclic gear, ↑planet wheel • Hypernyms: ↑gear, ↑gear wheel, ↑geared wheel, ↑cogwheel …   Useful english dictionary

  • wheel — A circular device, thin in relation to its face area, usually able to rotate about a central axle or pivot, with a durable but elastic rim or with regular teeth cut on the rim and for lightness often supported by spokes joined to the hub instead… …   Dictionary of automotive terms

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