Biology The responsive movement of a free-moving organism or cell toward or away from an external stimulus, such as light.
Medicine The moving of a body part by manipulation into normal position, as after a dislocation, fracture, or hernia.
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.