1. quad- = four Word List: quad-

2. quadrangle a four -sided enclosure, usually surrounded by buildings

3. quadrant one out of four equal parts of a circle; one section of a four-section coordinate grid

4. quadrant one out of four equal parts of a circle; one section of a four-section coordinate grid

5. quadrennial happening every four equal years Olympics happens every four years. Presidential elections are every four years. The next presidential election is 2016.

6. quadriceps a muscle group consisting of four muscles that is located along the front of the thigh

7. quadrilateral a plane figure in geometry that has four sides (including square, rectangle, rhombus, parallelogram, and trapezoid)

8. quadrilingual the ability to speak four languages

9. quadrisect to cut or divide into four equal parts

10. quadruped an animal with four feet

11. quadruple to create four times as much or as many of something

12. quadruplet a collection or group of four; one of four babies born from the same mother at the same time