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| physical object > natural object > particle > molecule > interstellar molecule > ethynyl | 
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| ethynyl comparison table | |||
| Subject | has definition | is a kind of | is an instance of | 
|---|---|---|---|
| interstellar molecule | Molecule present in interstellar space. As of late 1974, at least 33 molecular species had been identified with reasonable certainty. | molecule | |
| ethynyl | interstellar molecule | 
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