Promethium Definition
promethium
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
Usage tips for "promethium"
Understanding the precise definition of a word helps you use it with confidence. When using "promethium" in your writing, consider whether you need the word itself or one of its synonyms — subtle differences in meaning can change the tone of a sentence. If you're writing poetry or song lyrics, check the rhymes for promethium to find words that pair well.