Q
qi in Chinese medicine, body’s internal energy, transferred along channels (meridians) connecting whole body. Pronounced chee. See acupuncture.
QRS complex group of three distinct waves depicted on electrocardiogram, created by passage of cardiac electrical impulses through ventricles. Occurs at beginning of each ventricular contraction; R wave normally most prominent.
quadrant one-quarter of circumference of circle or area, e.g. abdominal surface.
quadruple test Down syndrome screening test, triple test with additional serum marker, inhibin a; also part of integrated test.
quadruplets four children born at same labour.
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