Glossary of Terms & Definitions
Listed Alphabetically - "Q"

QRS Wave: The deflection waves of an electrocardiogram that represent onset of ventricular depolarization.

Quadrant: One of four parts.

Quadriplegia: Paralysis of four limbs: two upper and two lower.

Quartile:  One fourth of a sample or population.

Quintile:  One fifth of a sample or population.