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| physical object > natural object > particle > charged particle > quark > heavy quark > charm | 
| charm comparison table | ||||
| Subject | is a kind of | is an instance of | has definition | has charge | 
|---|---|---|---|---|
| heavy quark | quark | non-zero | ||
| charm | heavy quark | The property that distinguishes one of the types of quarks. At present, there are six types of quarks known, one of which is the "charmed" quark. (See quark.) | 2/3 | 
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