pro revolution

Science Dictionary
revolution   (rěv'ə-l'shən)  Pronunciation Key 
  1. The motion of an object around a point, especially around another object or a center of mass.

  2. A single complete cycle of such motion.


Our Living Language  : In everyday speech revolution and rotation are often used as synonyms, but in science they are not synonyms and have distinct meanings. The difference between the two terms lies in the location of the central axis that the object turns about. If the axis is outside the body itself—that is, if the object is orbiting about another object—then one complete orbit is called a revolution. But if the object is turning about an axis that passes through itself, then one complete cycle is called a rotation. This difference is often summed up in the statement "Earth rotates on its axis and revolves around the Sun."
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Explore Dictionary.com
Previous Definition: pro reduction
Next Definition: pro science
Words Near: pro revolution
More from Thesaurus.com
Synonyms and Antonyms for pro revolution
More from Reference.com
Search for articles containing pro revolution
More from Dictionary.com Translator
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature