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Show words looked up
Word |
# |
Date |
Definition |
Site |
Level |
| sound wave |
1 |
today |
a longitudinal pressure wave in an elastic medium such as air, esp. one that is in an audible range. |
Main |
Adv. |
| focus |
1 |
today |
the point at which rays of light or heat come together or from which they seem to move away. [6 definitions] |
Kids |
Ch. |