tri-/quad-

a three sides figure

• triangle

• triathlon

• tricertops

• trilogy

a race that combines three activities-swimming, bicycling, and running.

• triangle

• triathlon

• tricertops

• trilogy

a dinosaur with three horns-two long horns above the eyes and one short horn on the nose

• triangle

• triathlon

• tricertops

• trilogy

a vehicle with three wheels

• triangle

• triathlon

• tricertops

• tricycle

three related movies, plays or novels

• triangle

• trilogy

• tricertops

• tricycle

One out of four equal parts of a circle; one section of a four-section coordinate grid

• quadrant

• quadriceps

• quadrilateral

• quadruple

A muscle group consisting of four muscles that is located along the front of the thigh.

• quadrant

• quadriceps

• quadrilateral

• quadruple

A plane figure in geometry that has four sides (including square, rhombus, rectangle, parallelogram, and trapezoid)

• quadrant

• quadriceps

• quadrilateral

• quadruple

To create four times as much or for as many of something

• quadrant

• quadriceps

• quadruplet

• quadruple

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

• quadrant

• quadriceps

• quadruplet

• quadruple