Helpful Hints
  • (1) You can search the entire content of Dean’s by phrase or by individual words. Just type your keywords into the search box and then pull down the search icon on the right and choose the option you need: search by word or by phrase or reset the content.
  • (2) Double click on a word in the content of a definition, and if the word is listed as a keyword in Dean’s, it will look that word up.
  • (3) You can use the search function to help jump the scrolling function. Simply type the first 2-3 letters into the search box then hit enter on your keyboard and the scroll will go to those Keywords that begin with those letters and allow you to scroll from there.

n. (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. 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. A star, as influencing the fate of a men. 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.

Register or login to access full content



Professors
Professionals
Students