| A | B |
|---|
| binocular | using both eyes |
| bicentennial | two hundredth anniversary |
| bilingual | able to speak two languages |
| bipedal | having two feet |
| triceps | muscles on the back of your upper arm |
| triathlon | a race with three events |
| triad | group of three |
| triplicate | in sets of three |
| unicorn | animal looking like a horse with one horn on its forehead |
| unify | to bring together as one |
| union | formation of one thing or group by bringing things or people together |
| unique | unlike any other |
| semicircle | half a circle |
| semiannual | twice a year |
| centipede | creature with many legs (literally "100 legs") |
| semicolon | symbol is ; |
| century | 100 years |
| centennial | hundredth anniversary |
| multiplication | operation opposite of division |
| composite | a number with more than two factors |
