- 1. n. A supposed metal, said by Phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light. Source: opted
- 2. n. a radioactive element of the actinide series; found in uranium ores Source: wordnet
- 3. A supposed metal, said by Phipson to be contained in commercial zinc; -- so called because certain of its compounds are darkened by exposure to light. Source: webster
- 4. A supposed metal, said by Phipson to be contained in commercialzinc; -- so called because certain of its compounds are darkened byexposure to light. Source: adambom
- 5. n. a radioactive element of the actinide series; found in uranium ores Source: ecdict
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actinium
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becausecalledcertaincompoundscontaineddarkenedlightmetalsaidsupposedactinidecommercialelementexposurefoundoresradioactiveseriesuraniumzinc