syndrome X
noun
\ -ˈeks
\
\
Medical Definition of syndrome X
1
: angina pectoris of a usually benign form in which the coronary arteriogram is normal
2
: metabolic syndrome
Metabolic syndrome, sometimes called syndrome X, was first defined in 1988 as a collection of health risks that may increase the chances of developing cardiovascular disease two-and-a-half to four times, and diabetes by four to six times.— Catherine Arnst, Business Week, 10 Oct. 2005