| NOUN | substance | beta iron | an allotrope of iron that is the same as alpha iron except that it is nonmagnetic |
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| Meaning | An allotrope of iron that is the same as alpha iron except that it is nonmagnetic; stable between 768 and 906 degrees centigrade. | |
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| Broader | iron, Fe, atomic number 26 | A heavy ductile magnetic metallic element |
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