In this article, we’ll provide you with a list of math terms that start with the letter Q, helping you expand your mathematical vocabulary.

**Quadrant-**One of the four sections of a coordinate plane.**Quadratic-**Pertaining to a polynomial of the second degree.**Quadrature-**The process of determining area under a curve.**Quadrilateral-**A four-sided polygon.**Quadruplicate-**To make four identical copies.**Quantile-**Division points in data, splitting it into intervals with equal probabilities.**Quantity-**An amount or number.**Quantitative-**Relating to the measurement of quantity.**Quantum-**A discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.**Quart-**A unit of liquid capacity equal to two pints or one fourth of a gallon.**Quartic-**A polynomial of the fourth degree.**Quartile-**Values that divide a data set into four equal parts.**Quasi-**Almost or nearly, e.g., quasi-periodic.**Quasi-**Experiment – A study that aims to evaluate interventions but lacks random assignment.**Quaternary-**Relating to the number four, or in a sequence of four.**Quaternion-**A complex number system that extends the complex numbers.