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| physical object > natural object > particle > charged particle > quark > heavy quark > bottom | 
| bottom comparison table | ||||
| Subject | is a kind of | is an instance of | has definition | has charge | 
|---|---|---|---|---|
| heavy quark | quark | non-zero | ||
| bottom | heavy quark | A flavor of quark. See flavor. | -1/3 | 
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