a three-sided figure
triangle
a race that combines three activities- swimming, bicycling, and running
triathlon
a dinosaur with three horns-two long horns above the eyes and one short horn on the nose
triceratops
a vehicle with three wheels
tricycle
having or involoving three sides, countries, or parties
trilateral
able to speak three different languages
trilingual
three related plays or novels
trilogy
a group of three people or things
trio
a three legged stool, table, or stand used to hold things, such as a camera
tripod
to cut into three parts
trisect