| NOUN | substance | hahnium, dubnium, Db, element 105, atomic number 105 | a transuranic element |
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| Meaning | A transuranic element. | |
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| Synonyms | dubnium, Db, element 105, atomic number 105 | |
| Broader | chemical element, element | Any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter |