失重症 shīzhòngzhèng space sickness Origin Definitions Defs Strokes Stroke Words Sentences Sents 失重 shīzhòng noun weightlessness weightlessness; a state where an object or person loses its original weight, occurring when gravity is countered by other forces like inertia or during orbit; zero gravity症 zhèng affixnoun disease (bound form) disease; illness; medical symptoms