a complex of symptoms including nausea, lethargy, headache, and sweating, occurring among astronauts under conditions of weightlessness.
Origin of space sickness
First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the nausea that people can experience in the gravity-free environment of space
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Motion sickness caused by sustained weightlessness during space flight, usually accompanied by disturbance of the inner ear.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.