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| cobalt |
a brittle silver-white metal that is one of the chemical elements. Cobalt is sometimes added to other metals in alloys to make them harder. It is also used in making some kinds of paint. (symbol: Co) |
| Colorado |
a state in the western United States. Its capital is Denver. (abbreviated: CO) [1/2 definitions] |
| comorbid |
of or pertaining to co-existing medical conditions in a patient. |
| comorbidity |
the presence of co-exisiting medical conditions in a patient. |
| Covid-19 |
a serious, sometimes fatal, disease caused by a certain type of virus called a "coronavirus." This particular coronavirus broke out for the first time in 2019, and the disease spread all over the world in 2020. "Co" in Covid stands for "corona," "vi" stands for "virus," and "d" stands for "disease." The number 19 refers to the year 2019. The name "Covid-19" is oftened shortened to "Covid." |
| Meriwether Lewis |
U.S. co-leader with William Clark of an expedition to explore the uncharted American West, from Missouri to Oregon, from 1804 to 1807 (b.1774--d.1809). |
| William Clark |
U.S. co-leader with Meriwether Lewis of an expedition to explore the uncharted American West, from Missouri to Oregon, from 1804 to 1807 (b.1770--d.1838). |
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