English dictionary
atomic number 61 meaning and definition
Definition and meaning of atomic number 61 at MeaningMonkey.org. atomic number 61 meaning and definition in the English Dictionary.ATOMIC NUMBER 61 noun
Definition of atomic number 61 (noun)
- a soft silvery metallic element of the rare earth group having no stable isotope; was discovered in radioactive form as a fission product of uranium
- synonyms: Pm, promethium
Source: Princeton University Wordnet