n.
Motion sickness caused by sustained weightlessness during space flight, usually accompanied by disturbance of the inner ear.
spacesick space'sick' (spās'sĭk') adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
