orthostatic definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
of or caused by an upright position: orthostatic hypotension
Origin: ortho- plush static
orthostatic definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Relating to or caused by standing upright: orthostatic hypotension.
Origin: ortho- + Greek statos, standing; see static + -ic.
orthostatic - Medical Definition
Relating to or caused by standing upright, as hypertension.