唐氏症 tángshìzhèng Down syndrome Origin Definitions Defs Strokes Stroke Words Sentences Sents 唐 táng Tang A common Chinese surname.氏 shì noun [honorific suffix] Added after surnames to refer to a person, a family, or a school of thought; often used for historical figures, celebrities, or professionals.症 zhèng affixnoun disease (bound form) disease; illness; medical symptoms