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Thesaurus: atomic number 91
a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead
Related headwords
actiniumdefinitiondisintegratingdefinitionelementdefinitionformeddefinitionleaddefinitionmetallicdefinitionradioactivedefinitionshort-liveddefinitionuraniumdefinitionatomicfamilyatomic bombfamilyatomic clockfamilyatomic cocktailfamilyatomic energyfamilyAtomic Energy Commissionfamilyatomic explosionfamilyatomic massfamilyatomic mass unitfamilyatomic numberfamilyatomic number 1familyatomic number 10familyatomic number 100familyatomic number 101familyatomic number 102familyatomic number 103familyatomic number 104familyatomic number 105familyatomic number 106family
Definitions
- n. a short-lived radioactive metallic element formed from uranium and disintegrating into actinium and then into lead