PROMETHIUM
promethium, Pm, atomic number
(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
Source: WordNet® 3.1
Etymology
Noun
promethium (uncountable)
A metallic chemical element (symbol Pm) with an atomic number of 61.
Synonyms
• (metallic element): (disused) cyclonium, (disused) florentium, (disused) illinium
Source: Wiktionary
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Word of the Day
3 July 2025
SENSE
(noun) the faculty through which the external world is apprehended; “in the dark he had to depend on touch and on his senses of smell and hearing”
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