Look-up History
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Show words looked up
Word |
# |
Date |
Definition |
Site |
Level |
| neutron |
1 |
today |
an elementary particle having no charge, spin of one-half, and mass approximately equal to a proton, present in the nucleus of all atoms except the common isotope of hydrogen. |
Main |
Adv. |
| flimsy |
1 |
today |
not solid or strong; weak. |
Main |
Int. |